Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Statement Of Financial Position [Abstract] Assets: Assets [Abstract] Investments: Investments [Abstract] Fixed-maturity securities available-for-sale, at fair value (amortized cost: $1,659,078 in 2015 and $1,667,500 in 2014) Available For Sale Securities Debt Securities Fixed-maturity securities held-to-maturity, at amortized cost (fair value: $330,338 in 2015 and $228,809 in 2014) Held To Maturity Securities Equity securities available-for-sale, at fair value (cost: $42,577 in 2015 and $43,738 in 2014) Available For Sale Securities Equity Securities Trading securities, at fair value (cost: $7,943 in 2015 and $7,710 in 2014) Trading Securities Policy loans Loans Insurance Policy Total investments Investments Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accrued investment income Accrued Investment Income Receivable Due from reinsurers Reinsurance Recoverables Deferred policy acquisition costs, net Deferred Policy Acquisition Costs Premiums and other receivables Premiums And Other Receivables Net Intangible assets, net (accumulated amortization: $70,128 in 2015 and $68,426 in 2014) Intangible Assets Net Excluding Goodwill Deferred income taxes Deferred Tax Assets Net Other assets Other Assets Separate account assets Separate Account Assets Total assets Assets Liabilities and Stockholders’ Equity: Liabilities And Stockholders Equity [Abstract] Liabilities: Liabilities [Abstract] Future policy benefits Liability For Future Policy Benefits Unearned premiums Unearned Premiums Policy claims and other benefits payable Liability For Claims And Claims Adjustment Expense Other policyholders’ funds Other Policyholder Funds Notes payable Notes Payable Surplus note Surplus Notes Income taxes Deferred Income Tax Liabilities Other liabilities Other Liabilities Payable under securities lending Obligation To Return Securities Received As Collateral Separate account liabilities Separate Accounts Liability Commitments and contingent liabilities (see Commitments and Contingent Liabilities note) Commitments And Contingencies Total liabilities Liabilities Stockholders’ equity: Stockholders Equity [Abstract] Common stock ($0.01 par value; authorized 500,000 in 2015 and 2014; issued and outstanding 50,111 shares in 2015 and 52,169 shares in 2014) Common Stock Value Paid-in capital Additional Paid In Capital Common Stock Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive income (loss), net of income tax: Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract] Unrealized foreign currency translation gains (losses) Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax Net unrealized investment gains (losses): Unrealized Gain Loss On Investments [Abstract] Net unrealized investment gains not other-than-temporarily impaired Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax Net unrealized investment losses other-than-temporarily impaired Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities Total stockholders’ equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Fixed-maturity securities available for sale, amortized cost Available For Sale Debt Securities Amortized Cost Basis Fixed-maturity securities held to maturity, fair value Held To Maturity Securities Fair Value Equity securities available for sale, cost Available For Sale Equity Securities Amortized Cost Basis Trading securities, cost Trading Securities Cost Intangible assets, net Intangible Assets Net Excluding Goodwill [Abstract] Accumulated amortization on definite-lived intangible assets Finite Lived Intangible Assets Accumulated Amortization Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Investment income net of investment expenses. Interest expense on surplus note. Income Statement [Abstract] Revenues: Revenues [Abstract] Direct premiums Direct Premiums Written Ceded premiums Ceded Premiums Written Net premiums Premiums Written Net Commissions and fees Fees And Commissions Investment income net of investment expenses Investment Income Net Of Investment Expense Interest expense on surplus note Interest Expense Surplus Note Net investment income Net Investment Income Realized investment gains (losses), including other-than- temporary impairment losses Realized Investment Gains Losses Other, net Other Income Total revenues Revenues Benefits and expenses: Benefits Losses And Expenses [Abstract] Benefits and claims Policyholder Benefits And Claims Incurred Net Amortization of deferred policy acquisition costs Deferred Policy Acquisition Cost Amortization Expense Sales commissions Sales Commissions And Fees Insurance expenses Other Underwriting Expense Insurance commissions Insurance Commissions Interest expense Interest Expense Other operating expenses Other Cost And Expense Operating Total benefits and expenses Benefits Losses And Expenses Income from continuing operations before income taxes Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Income taxes Income Tax Expense Benefit Income from continuing operations Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Income from discontinued operations, net of income taxes Income Loss From Discontinued Operations Net Of Tax Net income Profit Loss Basic earnings per share: Earnings Per Share Basic [Abstract] Continuing operations Income Loss From Continuing Operations Per Basic Share Discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Basic Share Basic earnings per share Earnings Per Share Basic Diluted earnings per share: Earnings Per Share Diluted [Abstract] Continuing operations Income Loss From Continuing Operations Per Diluted Share Discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Diluted Share Diluted earnings per share Earnings Per Share Diluted Weighted-average shares used in computing earnings per share: Earnings Per Share Basic And Diluted Other Disclosures [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Diluted Weighted Average Number Of Diluted Shares Outstanding Supplemental disclosures: Supplemental Income Statement Elements [Abstract] Total impairment losses Impairment Of Investments Impairment losses recognized in other comprehensive income before income taxes Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Parent Availableforsale Securities Net impairment losses recognized in earnings Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities Other net realized investment gains (losses) Gain Loss On Investments Excluding Other Than Temporary Impairments Realized investment gains (losses), including other-than- temporary impairment losses Dividends declared per share Common Stock Dividends Per Share Declared Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income (loss) before income taxes: Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract] Unrealized investment gains (losses): Other Comprehensive Income Available For Sale Securities Adjustment Before Tax Period Increase Decrease [Abstract] Change in unrealized holding gains/(losses) on investment securities Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax Reclassification adjustment for realized investment (gains) losses included in net income Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Before Tax Foreign currency translation adjustments: Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Period Increase Decrease [Abstract] Change in unrealized foreign currency translation gains (losses) Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax Total other comprehensive income (loss) before income taxes Other Comprehensive Income Loss Before Tax Income tax expense (benefit) related to items of other comprehensive income (loss) Other Comprehensive Income Loss Tax Other comprehensive income (loss), net of income taxes Other Comprehensive Income Loss Net Of Tax Total comprehensive income (loss) Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Statement Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid In Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Statement [Line Items] Statement [Line Items] Balance, beginning of period Repurchases of common stock Stock Repurchased And Retired During Period Value Net issuance of common stock Stock Issued During Period Value Share Based Compensation Balance, end of period Share-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Adjustments to paid-in capital, other Adjustments To Additional Paid In Capital Other Dividends Dividends Common Stock Cash Change in foreign currency translation adjustment, net of income tax expense (benefit) of $(195) in 2015 and $(8) in 2014 Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Change in net unrealized investment gains (losses) not-other-than temporarily impaired, net of income tax expense (benefit) of $(6,766) in 2015 and $13,285 in 2014 Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Change in net unrealized investment losses other-than-temporarily impaired, net of income tax expense (benefit) of $(0) in 2015 and 2014 Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Other Comprehensive Income Loss Tax Portion Attributable To Parent [Abstract] Change in foreign currency translation adjustment, income tax expense (benefit) Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax Change in net unrealized investment gains (losses) not-other-than-temporarily impaired, income tax expense (benefit) Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Change in net unrealized investment (losses) gains other-than-temporarily impaired, income tax expense (benefit) Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Portion Attributable To Parent Availableforsale Securities Proceeds from payment for sales purchases of short term investments using collateral held under securities lending net. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to cash provided by (used in) operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Change in future policy benefits and other policy liabilities Increase Decrease In Insurance Liabilities Deferral of policy acquisition costs Increase Decrease In Deferred Policy Acquisition Costs Change in income taxes Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable Realized investment (gains) losses, including other-than-temporary impairments Gain from sale of business, net Gain Loss On Sale Of Business Accretion and amortization of investments Accretion Amortization Of Discounts And Premiums Investments Depreciation and amortization Depreciation And Amortization Change in due from reinsurers Increase Decrease In Reinsurance Recoverable Change in premiums and other receivables Increase Decrease In Premiums Receivable Trading securities sold, matured, or called (acquired), net Proceeds From Payments For Trading Securities Share-based compensation Share Based Compensation Change in other operating assets and liabilities, net Increase Decrease In Other Operating Capital Net Net cash provided by (used in) operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Available-for-sale investments sold, matured or called: Proceeds From Sale And Maturity Of Available For Sale Securities [Abstract] Fixed-maturity securities — sold Proceeds From Sale Of Available For Sale Securities Debt Fixed-maturity securities — matured or called Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Equity securities Proceeds From Sale Of Available For Sale Securities Equity Available-for-sale investments acquired: Payments To Acquire Available For Sale Securities [Abstract] Fixed-maturity securities Payments To Acquire Available For Sale Securities Debt Equity securities Payments To Acquire Available For Sale Securities Equity Purchases of property and equipment and other investing activities, net Payments For Proceeds From Other Investing Activities Proceeds from sale of business Proceeds From Divestiture Of Businesses Cash collateral received (returned) on loaned securities, net Increase Decrease In Collateral Held Under Securities Lending Sales (purchases) of short-term investments using securities lending collateral, net Proceeds From Payment For Sales Purchases Of Short Term Investments Using Collateral Held Under Securities Lending Net Net cash provided by (used in) investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Dividends paid Payments Of Dividends Common Stock Common stock repurchased Payments For Repurchase Of Common Stock Excess tax benefits on share-based compensation Excess Tax Benefit From Share Based Compensation Financing Activities Tax withholdings on share-based compensation Payments Related To Tax Withholding For Share Based Compensation Cash proceeds from stock options exercised Proceeds From Stock Options Exercised Payments of deferred financing costs Payments Of Financing Costs Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Effect of foreign exchange rate changes on cash Effect Of Exchange Rate On Cash And Cash Equivalents Change in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Organization Consolidation And Presentation Of Financial Statements [Abstract] Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Segment Reporting [Abstract] Segment and Geographical Information Segment Reporting Disclosure [Text Block] Investments Debt And Equity Securities [Abstract] Investments Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Reinsurance Disclosures [Abstract] Reinsurance Reinsurance [Text Block] Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Stockholders Equity Note [Abstract] Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Share-Based Transactions Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingent Liabilities Commitments And Contingencies Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Use of Estimates Use Of Estimates Consolidation Consolidation Policy [Text Block] Reclassifications Prior Period Reclassification Adjustment Description Subsequent Events Subsequent Events Policy Policy [Text Block] Significant Accounting Policies Significant Accounting Policies [Text Block] New Accounting Principles New Accounting Pronouncements Policy Policy [Text Block] Continuing Operations by Segment Schedule Of Segment Reporting Information By Segment [Text Block] Assets by Segment Reconciliation Of Assets From Segment To Consolidated [Text Block] Long Lived Assets and Continuing Operations by Country Schedule Of Revenues From External Customers And Long Lived Assets By Geographical Areas Table [Text Block] Schedule of investments debt and equity securities. Schedule of investments debt and equity securities. Schedule Of Investments Debt And Equity Securities [Table] Schedule Of Investments Debt And Equity Securities [Table] Information By Category Of Debt Security Information By Category Of Debt Security [Axis] Other Than Temporary Impairment Credit Losses Recognized In Earnings Categories Of Investments Other Than Temporary Impairment Credit Losses Recognized In Earnings Categories Of Investments [Domain] Available-for-Sale [Member] Availableforsale Securities [Member] Schedule of Investments Debt and Equity Securities [Line Items] Schedule Of Investments Debt And Equity Securities [Line Items] Schedule of Available-for-sale Securities Reconciliation Schedule Of Available For Sale Securities Reconciliation Table [Text Block] Fixed-maturity Securities Classified by Contractual Maturity Date Investments Classified By Contractual Maturity Date Table [Text Block] Unrealized gains and losses in Aoci for Afs securities. Net Effect on Stockholders' Equity of Unrealized Gains and Losses on Available-for-sale Securities Unrealized Gains And Losses In Aoci For Afs Securities Table [Text Block] Net Investment Income Investment Income [Text Block] Schedule of Net Realized Investment Gains and Losses Schedule Of Realized Gain Loss Table [Text Block] Schedule of Securities in Unrealized Loss Position Available For Sale Securities Continuous Unrealized Loss Position Fair Value Table [Text Block] Schedule of investments in default. Amortized Cost and Fair Value of Available-for-sale Fixed-maturity Securities in Default Schedule Of Investments In Default Table [Text Block] Impairment losses recognized in earnings. Impairment Charges in Earnings on Available-for-sale Securities Impairment Losses Recognized In Earnings Table [Text Block] Schedule of Net Impairment and Credit Related Losses Recognized in Earnings for Available-for-sale Securities Other Than Temporary Impairment Credit Losses Recognized In Earnings Table [Text Block] Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Roll forward of Level 3 Assets Measured on Recurring Basis Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] Carrying Value and Estimated Fair Value for Financial Instruments Fair Value By Balance Sheet Grouping [Text Block] In-force Life Insurance Effects Of Reinsurance Table [Text Block] Reinsurance Receivable and Financial Strength Ratings by Reinsurer Schedule Of Ceded Credit Risk By Reinsurer [Text Block] Reconciliation of Number of Shares of Common Stock Schedule Of Common Stock Outstanding Roll Forward Table [Text Block] Calculation of Basic and Diluted Earnings Per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Impact of Equity Awards Granted Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block] Debt issuance costs Deferred Finance Costs Net Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Statement Business Segments Statement Business Segments [Axis] Segment Segment [Domain] Investment and Savings Products Segment [Member] Investments Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of operating segments Number Of Operating Segments Term Life Insurance Segment [Member] Life Insurance Segment [Member] Corporate and Other [Member] Corporate And Other [Member] Revenues Income (loss) from continuing operations before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Assets Assets excluding separate account assets. Assets, excluding separate account assets Assets Excluding Separate Account Assets Schedule Of Revenues From External Customers And Long Lived Assets [Table] Schedule Of Revenues From External Customers And Long Lived Assets [Table] Statement Geographical Statement Geographical [Axis] Segment Geographical Segment Geographical [Domain] UNITED STATES U S CANADA C A Revenues From External Customers And Long Lived Assets [Line Items] Revenues From External Customers And Long Lived Assets [Line Items] Long-lived assets Noncurrent Assets Schedule Of Available For Sale Securities [Table] Schedule Of Available For Sale Securities [Table] Major Types Of Debt And Equity Securities Major Types Of Debt And Equity Securities [Axis] Major Types Of Debt And Equity Securities Major Types Of Debt And Equity Securities [Domain] U.S. Government and Agencies [Member] U S Treasury And Government [Member] Foreign Government [Member] Foreign Government Debt Securities [Member] States and Political Subdivisions [Member] U S States And Political Subdivisions [Member] Corporates [Member] Corporate Debt Securities [Member] Asset-backed Securities [Member] Asset Backed Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Available-for-sale debt securities, amortized cost basis Available-for-sale debt securities gross unrealized gain Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Available-for-sale debt securities, gross unrealized loss Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Available-for-sale debt securities, at fair value Available-for-sale equity securities, cost Available-for-sale equity securities, gross unrealized gain Available For Sale Equity Securities Accumulated Gross Unrealized Gain Before Tax Available-for-sale equity securities, gross unrealized loss Available For Sale Equity Securities Accumulated Gross Unrealized Loss Before Tax Available-for-sale equity securities, at fair value Available-for-sale securities, amortized cost basis Available For Sale Securities Amortized Cost Available-for-sale securities, gross unrealized gain Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax Available-for-sale securities, gross unrealized loss Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax Available-for-sale securities, fair value Available For Sale Securities Other-than-temporary impairment losses, investments, portion in other comprehensive income (loss) Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Available-for-sale Securities, Debt Maturities [Abstract] Available For Sale Securities Debt Maturities [Abstract] Due in one year or less, amortized cost Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis Due after one year through five years, amortized cost Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis Due after five years through 10 years, amortized cost Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis Due after 10 years, amortized cost Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis Total fixed-maturity securities with single maturity dates, amortized cost Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis Mortgage and asset-backed securities, amortized cost Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost Due in one year or less, fair value Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value Due after one year through five years, fair value Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value Due after five years through 10 years, fair value Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value Due after 10 years, fair value Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value Total fixed-maturity securities with single maturity dates, fair value Available For Sale Securities Debt Maturities Single Maturity Date Mortgage and asset-backed securities, fair value Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value Available-for-sale debt securities, at fair value Accumulated other comprehensive income loss available for sale securities adjustment before tax including fcta and other than temporary impairment from fixed maturity and equity securities. Accumulated other comprehensive income loss available for sale securities adjustment before tax including fcta and other than temporary impairment currency swaps. Accumulated other comprehensive income loss foreign currency translation adjustment before tax available for sale securities. Accumulated other comprehensive income loss other than temporary impairment not credit loss before tax available for sale debt securities. Accumulated other comprehensive income loss available for sale securities adjustment before tax adjustment. Accumulated other comprehensive income loss available for sale securities adjustment tax. Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease [Abstract] Net unrealized investment gains including FCTA and OTTI, Fixed-maturity and Equity securities Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax Including Fcta And Other Than Temporary Impairment From Fixed Maturity And Equity Securities Net unrealized investment gains including FCTA and OTTI, currency swaps Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax Including Fcta And Other Than Temporary Impairment Currency Swaps Exclude unrealized foreign currency translation (gains) losses adjustment Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Before Tax Available For Sale Securities Exclude other-than-temporary impairments Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Before Tax Available For Sale Debt Securities Net unrealized investment gains excluding foreign currency translation adjustment and other-than- temporary impairments Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax Adjustment Less deferred income taxes Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax Net unrealized investment gains excluding foreign currency translation adjustment and other-than- temporary impairments, net of tax Schedule Of Trading Securities And Other Trading Assets [Table] Schedule Of Trading Securities And Other Trading Assets [Table] Investment Type Investment Type [Axis] Investment Type Categorization Member Investment Type Categorization [Member] Fixed-maturity Securities [Member] Fixed Maturities [Member] Schedule of Trading Securities and Other Trading Assets [Line Items] Schedule Of Trading Securities And Other Trading Assets [Line Items] Trading securities Schedule Of Held To Maturity Securities [Table] Schedule Of Held To Maturity Securities [Table] LLC note. LLC Note [Member] L L C Note [Member] Schedule Of Held To Maturity Securities [Line Items] Schedule Of Held To Maturity Securities [Line Items] Debt instrument, interest rate, stated percentage Debt Instrument Interest Rate Stated Percentage Held-to-maturity debt security estimated unrealized holding gain (or loss) Held To Maturity Securities Unrecognized Holding Gains Fair values of investments on deposit Assets Held By Insurance Regulators Securities loaned minimum collateral to loan ratio. Securities loaned additional collateral requirement decline in collateral value threshold percentage. Securities Received as Collateral [Abstract] Securities Received As Collateral [Abstract] Securities loaned, minimum collateral to loan ratio Securities Loaned Minimum Collateral To Loan Ratio Securities loaned, additional collateral requirement, decline in collateral value threshold percentage Securities Loaned Additional Collateral Requirement Decline In Collateral Value Threshold Percentage Cash collateral received and reinvested Cash Collateral For Borrowed Securities Schedule Of Investment Income Reported Amounts By Category [Table] Schedule Of Investment Income Reported Amounts By Category [Table] Held-to-Maturity [Member] Heldtomaturity Securities [Member] Equity Securities [Member] Equity Securities [Member] Policy Loans and other invested assets. Policy Loans and Other Invested Assets [Member] Policy Loans And Other Invested Assets [Member] Cash and Cash Equivalents [Member] Cash And Cash Equivalents [Member] Deposit asset underlying10 insurance agreement. Market return on deposit asset underlying 10% insurance agreement [Member] Deposit Asset Underlying10 Insurance Agreement [Member] Schedule of Net Investment Income, Reported Amounts, by Category [Line Items] Schedule Of Investment Income Reported Amounts By Category [Line Items] Gross investment income, operating Gross Investment Income Operating Investment expenses Investment Income Investment Expense Investment income net of investment expenses Realized Investment Gains Losses [Abstract] Gross gains from sales Available For Sale Securities Gross Realized Gains Gross losses from sales Available For Sale Securities Gross Realized Losses Other-than-temporary impairment losses Gains (losses) from bifurcated options Embedded Derivative Gain Loss On Embedded Derivative Net Gross realized investment gains (losses) reclassified from accumulated other comprehensive income into earnings Tax expense (benefit) associated with realized investment gains (losses) reclassified from accumulated other comprehensive income into earnings Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Tax Proceeds from sales or other redemptions Available For Sale Securities Gross Realized Gains Losses Sale Proceeds Fixed maturity and equity securities with cost basis in excess of fair value cost basis. Fixed-maturity and equity securities with cost basis in excess of fair value, cost basis Fixed Maturity And Equity Securities With Cost Basis In Excess Of Fair Value Cost Basis Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Available-for-sale securities, continuous unrealized loss position, less than 12 months, aggregate losses Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, less than one year Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year Available-for-sale securities, continuous unrealized loss position, 12 months or longer, fair value Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value Available-for-sale securities, continuous unrealized loss position, 12 months or longer, aggregate losses Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year Available for sale fixed maturity securities in default amortized cost. Available for sale fixed maturity securities in default fair value. Available-for-sale fixed-maturity securities in default, amortized cost Available For Sale Fixed Maturity Securities In Default Amortized Cost Available-for-sale fixed-maturity securities in default, fair value Available For Sale Fixed Maturity Securities In Default Fair Value Schedule Of Other Than Temporary Impairment Credit Losses Recognized In Earnings [Table] Schedule Of Other Than Temporary Impairment Credit Losses Recognized In Earnings [Table] Investments by default status. Investments By Default Status Investments By Default Status [Axis] Investments by default status. Investments By Default Status Investments By Default Status [Domain] Investments not in default. Investments in fixed-maturity securities not in default [Member] Investments Not In Default [Member] Investment in default. Investments in fixed-maturity securities in default [Member] Investment In Default [Member] Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] Impairment charges recognized in earnings Investment Investment [Axis] Investment Investment [Domain] Does not intend to sell or more likely than not will not be required to sell before recovery. Does not intend to sell or more-likely-than-not will not be required to sell before recovery [Member] Does Not Intend To Sell Or More Likely Than Not Will Not Be Required To Sell Before Recovery [Member] Intends to sell or more likely than not will be required to sell before recovery. Intends to sell or more-likely-than-not will be required to sell before recovery [Member] Intends To Sell Or More Likely Than Not Will Be Required To Sell Before Recovery [Member] Total other-than-temporary impairment losses Other-than-temporary impairment losses, portion in accumulated other comprehensive income (loss) Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities Other-than-temporary impairment losses, investments, portion recognized in earnings, net Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Sales, Maturities, Calls, Amortization Or Increases In Cash Flows. Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] Other Than Temporary Impairment Credit Losses Recognized In Earnings Roll Forward Cumulative other-than-temporary impairment, credit losses for securities still held, beginning balance Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held Additions for other-than-temporary impaired securities where no credit losses were recognized prior to the beginning of the period Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment Additions for other-than-temporary impaired securities where credit losses have been recognized prior to the beginning of the period Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses Reductions due to sales, maturities, calls, amortization or increases in cash flows expected to be collected over the remaining life of credit impaired securities Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Sales Maturities Calls Amortization Or Increase In Cash Flows Reductions for exchanges of securities previously impaired Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status Cumulative other-than-temporary impairment, credit losses for securities still held, ending balance Impairment losses held-to-maturity security Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Heldtomaturity Securities Embedded Derivative, Fair Value of Embedded Derivative, Net [Abstract] Embedded Derivative Fair Value Of Embedded Derivative Net [Abstract] Aggregate fair value of embedded conversion options Embedded Derivative Fair Value Of Embedded Derivative Asset Accumulated other comprehensive income loss deferred gain loss from closed contracts in net investment hedge net of tax. Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract] Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net [Abstract] Deferred loss related to closed forward contracts Accumulated Other Comprehensive Income Loss Deferred Gain Loss From Closed Contracts In Net Investment Hedge Net Of Tax Fair Value By Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value, Recurring Measurements [Member] Fair Value Measurements Recurring [Member] Fair Value By Liability Class Fair Value By Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Separate accounts liabilities. Separate Accounts Liabilities [Member] Separate Accounts Liabilities [Member] Fair Value By Asset Class Fair Value By Asset Class [Axis] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Separate accounts assets fair value disclosure. Separate Accounts Assets, Fair Value Disclosure [Member] Separate Accounts Assets Fair Value Disclosure [Member] Fair Value By Fair Value Hierarchy Level Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Measurements Fair Value Hierarchy Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value Inputs Level1 [Member] Level 2 [Member] Fair Value Inputs Level2 [Member] Level 3 [Member] Fair Value Inputs Level3 [Member] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Separate accounts assets Other Assets Fair Value Disclosure Assets, fair value disclosure, recurring Assets Fair Value Disclosure Recurring Separate account liabilities Liabilities Related To Investment Contracts Fair Value Disclosure Liabilities, fair value disclosure, recurring Liabilities Fair Value Disclosure Recurring Fair value assumptions percentage of securities assessed by third party pricing service. Fair value assumptions, percentage of securities assessed by third-party pricing service Fair Value Assumptions Percentage Of Securities Assessed By Third Party Pricing Service Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Level 3 assets, beginning of period Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Net unrealized gains (losses) included in other comprehensive income Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss Realized gains (losses) and accretion (amortization) recognized in earnings, including OTTI Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 Settlements Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements Transfers into Level 3 Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 Transfers out of Level 3 Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 Level 3 assets, end of period Fair value equity, level 1 to level 2 transfers, amount Fair Value Equity Level1 To Level2 Transfers Amount Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value By Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts Fair Value Disclosure Item Amounts [Domain] Reported Value Measurement [Member] Carrying Reported Amount Fair Value Disclosure [Member] Estimate of Fair Value Measurement [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Longterm Debt Type Longterm Debt Type [Axis] Longterm Debt Type Longterm Debt Type [Domain] Senior Notes [Member] Senior Notes [Member] Fair value, Nonrecurring Measurements [Member] Fair Value Measurements Nonrecurring [Member] Deposits [Member] Deposits [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Policy loans Loans Receivable Fair Value Disclosure Deposit asset underlying 10% coinsurance agreement Regulatory Assets Noncurrent Fair Value Disclosure Notes payable Debt Instrument Fair Value Fixed-maturity securities held to maturity Percentage of coinsurance covered costs. Percentage of coinsurance costs Percentage Of Coinsurance Covered Costs Direct life insurance in force Life Insurance In Force Gross Amounts ceded to other companies Life Insurance In Force Ceded Net life insurance in force Life Insurance In Force Net Percentage of reinsured life insurance in force Contracts In Force Subject To Participation Through Reinsurance Percentage Ceded Credit Risk [Table] Ceded Credit Risk [Table] Ceded Credit Risk Ceded Credit Risk [Axis] Ceded Credit Risk Reinsurer Ceded Credit Risk Reinsurer [Domain] Prime reinsurance company. Prime Reinsurance Company [Member] Prime Reinsurance Company [Member] SCOR global life reinsurance companies. SCOR Global Life Reinsurance Companies [Member] S C O R Global Life Reinsurance Companies [Member] Financial reassurance company 2010, ltd. Financial Reassurance Company 2010, Ltd. [Member] Financial Reassurance Company2010 Ltd [Member] Swiss re life health America inc. Swiss Re Life & Health America Inc. [Member] Swiss Re Life Health America Inc [Member] American health and life insurance company. American Health and Life Insurance Company [Member] American Health And Life Insurance Company [Member] Munich American reassurance company. Munich American Reassurance Company [Member] Munich American Reassurance Company [Member] Korean reinsurance company. Korean Reinsurance Company [Member] Korean Reinsurance Company [Member] RGA reinsurance company. RGA Reinsurance Company [Member] R G A Reinsurance Company [Member] Toa reinsurance company. TOA Reinsurance Company [Member] Toa Reinsurance Company [Member] Hannover Life reassurance company. Hannover Life Reassurance Company [Member] Hannover Life Reassurance Company [Member] All other reinsurers. All Other Reinsurers [Member] All Other Reinsurers [Member] Credit Rating A M Best Credit Rating A M Best [Axis] Credit Rating A M Best Credit Rating A M Best [Domain] External credit rating not rated. External credit rating, not rated [Member] External Credit Rating Not Rated [Member] AM Best, A Rating [Member] A M Best A Rating [Member] AM Best, A+ Rating [Member] A M Best A Plus Rating [Member] A- u credit rating as defined by the external credit rating agency, AM Best. AM Best, A- u Rating [Member] A M Best A Minus U Rating [Member] AM Best, A- Rating [Member] A M Best A Minus Rating [Member] Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Reinsurance receivable Debt Instrument [Table] Debt Instrument [Table] Surplus note. Surplus Note [Member] Surplus Note [Member] Range Range [Axis] Range Member Range [Member] Maximum [Member] Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument, face amount Debt Instrument Face Amount Debt instrument maturity date Debt Instrument Maturity Date Common stock, beginning of period Shares issued for stock options exercised Stock Issued During Period Shares Stock Options Exercised Shares of common stock issued upon lapse of restricted stock units ("RSUs") Stock Issued During Period Shares Share Based Compensation Common stock retired Stock Repurchased And Retired During Period Shares Common stock, end of period Equity [Abstract] Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Award Type Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted stock units (RSUs) [Member] Restricted Stock Units R S U [Member] Share Repurchase Program Share Repurchase Program [Axis] Share Repurchase Program Share Repurchase Program [Domain] Share repurchase program. Share Repurchase Program [Member] Share Repurchase Program [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number Stock repurchased program, authorized amount Stock Repurchase Program Authorized Amount1 Stock repurchased and retired during period, shares Stock repurchased and retired during period, value Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program Remaining Authorized Repurchase Amount1 Schedule Of Earnings Per Share Basic By Common Class [Table] Schedule Of Earnings Per Share Basic By Common Class [Table] Statement Operating Activities Segment Statement Operating Activities Segment [Axis] Segment Operating Activities Segment Operating Activities [Domain] Continuing Operations [Member] Segment Continuing Operations [Member] Discontinued Operations [Member] Segment Discontinued Operations [Member] Stock Compensation Plan [Member] Stock Compensation Plan [Member] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share Basic [Line Items] Income from continuing operations Income attributable to unvested participating securities, basic EPS Participating Securities Distributed And Undistributed Earnings Loss Basic Income used in calculating basic EPS Net Income Loss Available To Common Stockholders Basic Income from discontinued operations Weighted-average vested shares Basic EPS from continuing operations Basic EPS from discontinued operations Income attributable to unvested participating securities, diluted EPS Participating Securities Distributed And Undistributed Earnings Loss Diluted Income used in calculating diluted EPS Net Income Loss Available To Common Stockholders Diluted Dilutive effect of incremental shares to be issued for equity awards Incremental Common Shares Attributable To Share Based Payment Arrangements Weighted-average shares used in calculating diluted EPS Diluted EPS from continuing operations Diluted EPS from discontinued operations Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Recognition of nonemployee sharebased compensation. Recognition Of Nonemployee Sharebased Compensation Recognition Of Nonemployee Sharebased Compensation [Axis] Recognition of nonemployee share-based compensation. Recognition Of Nonemployee Sharebased Compensation Recognition Of Nonemployee Sharebased Compensation [Domain] Expense deferred. Expense Deferred [Member] Expense Deferred [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Total equity awards expense recognized Allocated Share Based Compensation Expense Quarterly incentive awards expense deferred Issuance Of Stock And Warrants For Services Or Claims Two thousand and fifteen management awards. 2015 Management Awards [Member] Two Thousand And Fifteen Management Awards [Member] Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Commitments and contingent liabilities. Commitments and contingent liabilities. Commitments And Contingent Liabilities [Table] Commitments And Contingent Liabilities [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Letter of Credit [Member] Letter Of Credit [Member] Commitments And Contingent Liabilities [Line Items] Commitments And Contingent Liabilities [Line Items] Letter of credit, outstanding Letters Of Credit Outstanding Amount Number of jurisdiction. Number of jurisdiction Number Of Jurisdiction