Document and Entity Information Entities [Table] Entity Information [Line Items] Document and Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Consolidated Balance Sheets Statement [Table] Statement [Line Items] Assets [Abstract] ASSETS Cash and Cash Equivalents, at Carrying Value Cash and equivalents at end of period Cash and equivalents at beginning of period Cash and equivalents The total amount due to the entity within one year of the balance sheet date relating to royalty contracts. Royalty Receivables Royalty receivables Income Taxes Receivable, Current Income tax receivable Inventory, Gross Stream inventory Prepaid Expense and Other Assets, Current Prepaid expenses and other Assets, Current Total current assets Mineral Properties, Net Royalty and stream interests, net (Note 3) Total royalty and stream interest, net Net Royalty and stream interests, net Available-for-sale Securities, Noncurrent Available-for-sale securities (Note 4) Other Assets, Noncurrent Other assets Assets Total assets Liabilities [Abstract] LIABILITIES Accounts Payable, Current Accounts payable Dividends Payable, Current Dividends payable Represents the carrying value, as of the balance sheet date, of the unpaid sum of foreign withholding taxes payable. Foreign Withholding Taxes Payable, Current Foreign withholding taxes payable Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Debt (Note 5) Total debt Deferred Tax Liabilities, Net, Noncurrent Deferred tax liabilities Liability for Uncertain Tax Positions, Noncurrent Uncertain tax positions (Note 9) Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies (Note 12) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] EQUITY Preferred Stock, Value, Issued Preferred stock, $.01 par value, authorized 10,000,000 shares authorized; and 0 shares issued Common Stock, Value, Issued Common stock, $.01 par value, 100,000,000 shares authorized; and 65,082,861 and 65,033,547 shares outstanding, respectively Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Accumulated earnings Stockholders' Equity Attributable to Parent Total Royal Gold stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Liabilities and Equity Total liabilities and equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Outstanding Common stock, shares outstanding Consolidated Statements of Operations Royalty Revenue. Revenue Total revenue Operating Costs and Expenses [Abstract] Costs and expenses Cost of Gold Products and Services Cost of sales General and Administrative Expense General and administrative Taxes, Miscellaneous Production taxes Exploration Expense, Mining Exploration costs Depreciation, Depletion and Amortization Depreciation, depletion and amortization Asset Impairment Charges Impairment of royalty and stream interests Operating Expenses Total costs and expenses Operating Income (Loss) Operating income (loss) Interest and Other Income Interest and other income The cost of borrowed funds accounted for as interest that was charged against earnings during the period and other expenses not previously classified. Interest and Other Expense Interest and other expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income Tax Expense (Benefit) Income tax (expense) benefit Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Net income (loss) Net (loss) income Net Income (Loss) Attributable to Noncontrolling Interest Net loss (income) attributable to non-controlling interests Net Income (Loss) Available to Common Stockholders, Basic Net income (loss) attributable to Royal Gold common stockholders Net income (loss) available to Royal Gold common stockholders (in dollars) Other Comprehensive Income (Loss), Net of Tax [Abstract] Adjustments to comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized change in market value of available-for-sale securities Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Comprehensive loss (income) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) attributable to Royal Gold stockholders EARNINGS PER SHARE ("EPS") Net income (loss) per share available to Royal Gold common stockholders: Earnings Per Share, Basic Basic earnings (loss) per share (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Basic weighted average shares outstanding (in shares) Weighted-average shares for basic EPS Earnings Per Share, Diluted Diluted earnings (loss) per share (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted Diluted weighted average shares outstanding (in shares) Weighted-average shares for diluted EPS Common Stock, Dividends, Per Share, Declared Cash dividends declared per common share (in dollars per share) Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash provided by operating activities: Share-based Compensation Non-cash employee stock compensation expense Amortization of Debt Discount (Premium) Amortization of debt discount Amount of deferred tax expense (benefit) from write-off of the deferred tax asset related to deductible stock options at exercise. Deferred Tax Expense from Stock Options Exercised, Credit Balance Tax expense (benefit) of stock-based compensation exercises Deferred Income Tax Expense (Benefit) Deferred tax benefit Other Noncash Income (Expense) Other Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Receivables Royalty receivables Increase (Decrease) in Inventories Stream inventory Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Increase (Decrease) in Accounts Payable Accounts payable Represents the increase (decrease) during the period in the amount due for foreign withholding taxes payable. Increase (Decrease) in Foreign Withholding Taxes Payable Foreign withholding taxes payable Increase (Decrease) in Income Taxes Receivable Income taxes receivable Increase (Decrease) in Income Taxes Payable Uncertain tax positions Increase (Decrease) in Other Operating Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments for (Proceeds from) Businesses and Interest in Affiliates Acquisition of royalty and stream interests Amount of cash inflow from the sale of royalty recognized in investing activities. Proceeds From Royalty Sale Andacollo royalty termination The cash outflow associated with extending a loan. Payment To Fund Loans Golden Star term loan Payments for (Proceeds from) Other Investing Activities Other Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Proceeds from Long-term Lines of Credit Borrowings from revolving credit facility Proceeds from Issuance of Common Stock Net proceeds from issuance of common stock Payments of Ordinary Dividends, Common Stock Common stock dividends Payments to Noncontrolling Interests Distribution to non-controlling interests Amount of tax benefit (expense) related to stock-based compensation that was exercised. Excess Tax Benefit (Expense) From Share Based Compensation Financing Activities Tax (benefit) expense of stock-based compensation exercises Proceeds from (Payments for) Other Financing Activities Other Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Continuing Operations Net (decrease) increase in cash and equivalents OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ACQUISITIONS Description of mineral royalty acquisitions completed during the period, including background, timing, and recognized assets and liabilities. This element is used as a single block of text to encapsulate the entire disclosure (including data and tables) regarding asset acquisitions. Royalty Acquisitions Disclosure [Text Block] ACQUISITIONS ROYALTY AND STREAM INTERESTS The entire disclosure for royalty interests in mineral properties. Royalty Interest in Mineral Properties Disclosures [Text Block] ROYALTY AND STREAM INTERESTS AVAILABLE-FOR-SALE SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] AVAILABLE-FOR-SALE SECURITIES DEBT Debt Disclosure [Text Block] DEBT REVENUE Disclosure pertaining to revenue. Revenues Disclosure [Text Block] REVENUE STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] STOCK-BASED COMPENSATION Earnings Per Share [Text Block] EARNINGS PER SHARE ("EPS") INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES SUBSEQUENT EVENT Subsequent Events [Text Block] SUBSEQUENT EVENT Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Asset Impairment Tabular disclosure of royalty interests in mineral properties of the entity, including gross amount, accumulated depletion and net amount as of the balance sheet date. Schedule of Royalty Interests in Mineral Properties [Table Text Block] Schedule of royalty and stream interests Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of available-for-sale securities Schedule of Long-term Debt Instruments [Table Text Block] Schedule of non-current debt Tabular disclosure pertaining to revenue of the entity. Schedule of Revenue [Table Text Block] Schedule of revenue Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of stock-based compensation expenses Schedule of Share-based Compensation, Activity [Table Text Block] Schedule of stock-based compensation awards Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] Schedule of unrecognized compensation expense and weighted-average vesting period for each of the stock-based compensation awards Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of the effects of dilutive securities on diluted EPS Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of income tax expense and effective tax rate Long-lived Assets by Geographic Areas [Table Text Block] Royal Gold's long-lived assets (royalty and stream interests, net) Revenue from External Customers by Geographic Areas [Table Text Block] Net revenue by reportable segment Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of financial assets measured at fair value on recurring basis Represents the minimum number of metals produced from a mine of which the right to purchase all or a portion is available in exchange for upfront deposit. Minimum Number of Metals Produced from Mine of which Right to Purchase in All or Portion Available in Exchange for Upfront Deposit Minimum number of metals produced from a mine of which right to purchase all or a portion available in exchange for upfront deposit Schedule of Business Acquisitions, by Acquisition [Table] Significant Acquisitions and Disposals [Line Items] Acquisition of Royalty Interest in Mineral Properties Payments to Acquire Interest in Subsidiaries and Affiliates Total investment on subsidiary Noncontrolling Interest, Ownership Percentage by Parent Ownership interest (as a percent) Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Total purchase amount Represents the increase in the consideration transferred by the acquirer in a business combination. Business Combination Consideration Increase in Purchase Price Additional investment Represents the minimum investment amount by a third party as required by the agreement. Investment Required By Third Party Investment by third party Represents the number of installments per the agreement. Agreement Number Of Installments Number of installments Percentage of royalty interests acquired by the entity. Royalty Acquisition, Percentage of Royalty Interests Acquired Percentage of royalty interests acquired The net value royalty silver interest percentage owned as of the reporting date by a related party of the reporting entity. Related Party Net Value Royalty Silver Interest Percentage Owned Percentage of silver royalty interests acquired Represents the quantity of silver produced or delivered under the terms of the agreement. Quantity of Silver Maximum quantity of silver with specified purchase price (in ounces) Represents the purchase price per ounce as percentage of spot price at the time of delivery. Purchase Price Per Ounce As Percentage Of Spot Price At Time Of Delivery Purchase price per ounce of the commodities as percentage of spot price at the time of delivery Represents the quantity of gold produced or delivered under the terms of the agreement. Quantity of Gold Gold delivered (in ounces) Loans and Leases Receivable, Gross Gross loans Represents the term of the loans made. Loans Receivable, Term Term of loan Represents the percentage of the average daily gold price to determine the interest rate on loans made. Percentage of Average Daily Gold Price Used to Determine Interest Rate Quarterly interest rate based on average gold rate divided by 10,000 Represents the denominator used in calculating quarterly interest rate based on average daily gold price. Loans Receivable, Denominator Used In Calculation Of Quarterly Interest Rate Based On Average Daily Gold Price Denominator used in calculation of quarterly interest rate Fixed Rate of interest on the amount of loan. Loans Receivable with Fixed Rates of Interest, Percentage Interest rate (as a percent) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Number of shares of common stock that can be purchased by the warrants Represents the grant date fair value of shares granted on exercise of warrants. Class of Warrant or Right, Fair Value of Shares Granted Grant date fair value on exercise of warrants Represents the term of the warrants. Class of Warrant or Right, Term Of Warrants Term of warrants Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise price of warrants Represents the amounts paid allocated to production stage steam interests. Agreement, Allocation To Production Stage Steam Interests Allocation to production stage steam interest Represents the amounts paid allocated to exploration stage steam interest. Agreement, Allocation To Exploration Stage Steam Interests Allocation to exploration stage steam interest Represents first, second and third scheduled payments pursuant to terms of agreement. First Second And Third Scheduled Payments First, second and third installments Represents the fourth installment pursuant to the terms of the agreement. Fourth Scheduled Payment Fourth installment Represents the installment payable upon meeting the capital spending requirements under the agreement. Agreement Installment Payable Upon Meeting Capital Spending Requirement Installment payable upon meeting capital spending requirement Represents the capital spending requirement under the agreement, to trigger the installment payment. Agreement Installment, Capital Spending Requirement For Payment Capital spending requirement (as a percent) The percentage of produced payable gold to be purchased until threshold number of ounces has been delivered as per Purchase and Sale Agreement. Royalty Acquisition, Percentage of Payable Gold Acquired for Each Payable Ounce of Gold up to Threshold Percentage of produced payable gold to be purchased until 48,000 ounces have been delivered Maximum quantity of gold that can be purchased for the specified maximum purchase price per ounce. Maximum Quantity of Gold Purchases with Specified Purchase Price Maximum quantity of gold with specified purchase price (in ounces) Represents the fixed percentage of gold payable under the agreement. Royalty Acquisition, Fixed Payable Percentage Of Gold Acquired Fixed percentage of produced gold payable (as a percent) Represents the purchase price per ounce as percentage of monthly average gold price for the month preceding the delivery date. Purchase Price Per Ounce As Percentage Of Monthly Average Gold Price For Month Preceding Delivery Date Purchase price per ounce as a percentage of monthly average gold price for the month preceding the delivery date Payments to Acquire Royalty Interests in Mining Properties Cash paid for acquisition of royalty interests The percentage of produced payable gold to be purchased after threshold number of ounces has been delivered as per Purchase and Sale Agreement. Royalty Acquisition, Percentage of Payable Gold Acquired for Each Payable Ounce of Gold over Threshold Percentage of produced payable gold to be purchased after 48,000 ounces have been delivered Percentage of silver royalty interests acquired by the entity. Silver Royalty Acquisition, Percentage of Royalty Interests Acquired Percentage of silver royalty interests acquired Represents the area of interest surrounding the presently owned mine, as well as any other mining concessions presently owned or acquired by CMCA or any of its affiliates. Royalty Agreement, Mining Concessions, Area Of Interest Range Area of mining to be eligible for concessions Mineral Properties, Gross Cost Carrying value Table or schedule providing information pertaining to royalty interests in mineral properties of the entity, including background, timing, percentage of royalty acquired, consideration paid, restructuring gain, gross amount, accumulated depletion and net amount as of the balance sheet date. Schedule of Royalty Interests in Mineral Properties [Table] Project [Axis] Project [Member] Project [Domain] Represents the production stage royalty interest of the entity. Production Stage Royalty Interest [Member] Production Stage Royalty Interest Represents the production stage stream interests of the entity. Production Stage Stream Interests [Member] Production Stage Stream Interests Represents the production stage royalty and steam interests of the entity. Production Stage Royalty And Stream Interests [Member] Production Stage Royalty and Stream Interests Represents the development stage royalty interest of the entity. Development Stage Royalty Interest [Member] Development Stage Royalty Interest Represents the development stage steam interest of the entity. Development Stage Stream Interest [Member] Development Stage Stream Interest Represents the development stage royalty and stream interest of the entity. Development Stage Royalty And Stream Interest [Member] Development Stage Royalty and Stream Interest Represents the exploration stage royalty interest of the entity. Exploration Stage Royalty Interest [Member] Exploration Stage Royalty Interest Represents exploration stage stream interest of entity. Exploration Stage Stream Interest [Member] Exploration Stage Stream Interest Member Name of Property [Axis] Real Estate And Accumulated Depreciation Name Of Property [Domain] Name of Property [Domain] Represents Andacollo, a mine in which the entity has royalty interests. Andacollo [Member] Andacollo Represents Voisey's Bay, a mine in which the entity has royalty interests. Voiseys Bay [Member] Voisey's Bay Represents Penasquito, a mine in which the entity has royalty interests. Penasquito [Member] Penasquito Represents Mulatos, a mine in which the entity has royalty interests. Mulatos [Member] Mulatos Represents Holt, a mine in which the entity has royalty interests. Holt [Member] Holt Represents Robinson, a mine in which the entity has royalty interests. Robinson [Member] Robinson Represents Mt. Milligan, a mine in which the entity has royalty interests. Mt Milligan [Member] Mt. Milligan Represents mines, other than those elsewhere enumerated, in which the entity has royalty interests. Other Mines [Member] Other Represents Cortez, a mine in which the entity has royalty interests. Cortez [Member] Cortez Represents Pascua-Lama, a mine in which the entity has royalty interests. Pascua Lama [Member] Pascua Lama Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Royalty Interest in Mineral Properties [Line Items] Royalty and stream interests Mineral Properties, Accumulated Depletion Accumulated Depletion Mineral Properties, Accumulated Impairment Impairments Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types Of Debt And Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Represents the information pertaining to Seabridge Gold, Inc. Seabridge Gold Inc [Member] Seabridge Schedule of Available-for-sale Securities [Line Items] Available-for-sale securities Available-for-sale Securities, Amortized Cost Basis Cost Basis Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Unrealized Loss Available-for-sale Securities. Marketable equity securities Fair Value Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Loss on available-for-sale securities due to impairment Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Convertible Notes Payable [Member] Convertible notes due 2019, net Line Of Credit [Member] Revolving credit facility Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Debt Instrument [Line Items] Long-term debt disclosure Debt Instrument, Face Amount Aggregate principal amount of convertible senior notes issued Debt Instrument, Interest Rate, Stated Percentage Interest rate on convertible senior notes (as a percent) Interest Expense, Debt Interest expense recognized Line of Credit Facility, Maximum Borrowing Capacity Maximum availability under the revolving credit facility Line of Credit Facility, Remaining Borrowing Capacity Available under the revolving credit facility Line of Credit Facility, Amount Outstanding Outstanding amount under credit facility Debt Instrument, Basis Spread on Variable Rate Revolving credit facility, basis spread on interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Effective interest rate (as percent) Represents revenue from stream interests. Stream Interests Revenue Stream interests Represents revenue from royalty interests. Royalty Interests Revenue Royalty interests Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Employee Stock Option [Member] Stock options Stock Appreciation Rights S A R S [Member] Stock appreciation rights Restricted Stock [Member] Restricted stock Performance Shares [Member] Performance stock Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation expense Stock-based compensation Allocated Share-based Compensation Expense Stock-based compensation expense Represents the reversal of an expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Allocated Share-based Compensation Expense, Credit Balance Stock-based compensation expense (reversal) Stock-based compensation awards granted: Stock options, number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Total stock-based compensation expense Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] Unrecognized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted-average vesting period (years) Weighted Average Number Diluted Shares Outstanding Adjustment Effect of other dilutive securities (in shares) Represents the impact on diluted earnings per share due to settlement or exchange of potentially dilutive securities. Earnings Per Share Diluted Adjustment Impact on diluted earnings per share (in dollars per share) Debt Instrument, Convertible, Conversion Price 2019 Conversion Notes, Initial conversion price per share of common stock (in dollars per share) Effective Income Tax Rate Reconciliation, Percent Effective tax rate (as a percent) Unrecognized Tax Benefits Total gross unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Accrued income-tax-related interest and penalties Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] C [A] Canada C [L] Chile M [X] Mexico U [S] United States A [U] Australia Africa [Member] Africa X [X] Other. Revenues from External Customers and Long-Lived Assets [Line Items] Long Lived Assets and Pre-Tax Income by Geographical Information Number of Reportable Segments Number of reportable segments Gross Profit Net revenue Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Measurements Recurring [Member] Recurring basis Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Carrying Reported Amount Fair Value Disclosure [Member] Carrying Amount Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Financial assets measured at fair value on recurring basis Assets, Fair Value Disclosure [Abstract] Assets: Other Assets, Fair Value Disclosure Warrants Assets, Fair Value Disclosure Total assets Liabilities, Fair Value Disclosure [Abstract] Liabilities: Long-term Debt, Fair Value Debt Financial and Nonfinancial Liabilities, Fair Value Disclosure Total liabilities Debt Instrument, Convertible, Carrying Amount of Equity Component Amount of equity component of convertible notes Schedule of percentage of ownership interest in a partnership held by the entity. Schedule of Partnership Ownership Interests [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] Represents Canadian Minerals Partnership, a wholly-owned indirect subsidiary of the entity. Canadian Minerals Partnership [Member] Canadian Minerals Partnership Represents Altius, a company unrelated to the entity. Altius [Member] Altius Represents Voisey's Bay Holding Corporation, a wholly-owned indirect subsidiary of the entity. Voiseys Bay Holding Corporation [Member] Voiseys Bay Holding Corporation Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Partnership Ownership Interests [Line Items] Commitments and contingencies Loss Contingency, Information about Litigation Matters [Abstract] Commitments and Contingencies Business Combination, Consideration Transferred, Liabilities Incurred Remaining commitment amount Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Percentage of ownership interest held in Labrador Nickel Royalty Limited Partnership ("LNRLP") Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Events Subsequent Event [Line Items] Subsequent event Security interest on assets. Security Interest On Asset Security interest on assets Represents RGLD Gold AG, a wholly owned subsidiary of the entity. R G L D Gold A G [Member] RGLD Gold Represents, Royal Gold Chile Limitada, a wholly owned subsidiary of the entity. Royal Gold Chile Limitada [Member] RG Chile Represents Teck Resources Limited that accounts for 10 percent or more of the entity's revenues. Teck [Member] Teck Counterparty Name [Axis] Repurchase Agreement Counterparty Name [Domain] Counterparty Name [Domain] Represents Golden Star Resources Limited and its subsidiaries. Golden Star Resources Ltd And Subsidiaries [Member] Golden Star Represents information pertaining to BGC Holdings Ltd. ("BGC"), a wholly-owned subsidiary of Barrick. B G C Holdings Ltd [Member] BGC Represents information pertaining to New Gold Inc., a wholly-owned subsidiary of the entity. New Gold Inc [Member] New Gold Inc Represents, Compania Minera Teck Carmen De Andacollo, a subsidiary of Tech Resources Limited. Compania Minera Teck Carmen De Andacollo [Member] CMCA Represent of Wassa, Bogoso and Prestea gold stream acquisition. Wassa Bogoso And Prestea [Member] Wassa, Bogoso and Prestea Represents the information pertaining to the Pueblo Viejo mine located in the Dominican Republic. Pueblo Viejo [Member] Pueblo Viejo Represents the information pertaining to the Rainy River Project located in Ontario, Canada. Rainy River Project [Member] Rainy River Represents the Carmen De Andacollo copper gold mine in which the entity has royalty interest. Carmen De Andacollo Copper Gold Mine [Member] Carmen de Andacollo Represents activity under the first set of conditions under the agreement. Condition One [Member] First Condition Represents activity under the second set of conditions under the agreement. Condition Two [Member] Second Condition Represents initial royalty that the entity acquired. Initial Royalty [Member] Initial Royalty Represents the royalty that the entity will own subsequent to meeting the contractual threshold. Subsequent Royalty [Member] Subsequent Royalty Represents the royalty that the entity will own subsequent to meeting the contractual threshold. Subsequent Two Royalty [Member] Subsequent Two Royalty Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets [Member] Other assets Primary financial statement caption encompassing royalty and steam interests, net. Royalty And Stream Interests Net [Member] Royalty and stream interests, net Represents Phoenix Gold Project located in Ontario, Canada, a mine in which the entity has acquired gold stream interests from Rubicon Minerals Corporation. Phoenix Gold Project [Member] Phoenix Gold Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] LIBOR Segments [Axis] Segment [Domain] Segments [Domain] Represents information pertaining to the Royalty Interest segment, a reportable segment of the company. Royalty Interest Segment [Member] Royalty Interest Represents information pertaining to the Stream Interest segment, a reportable segment of the company. Stream Interest Segment [Member] Stream Interest D [O] Dominican Republic Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Financial Instruments [Domain] Equity Securities [Member] Marketable equity Securities Warrant [Member] Warrants Fair Value Inputs Level2 [Member] Level 2 Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value Represent of Rainy river gold and silver stream acquisition. Rainy River [Member] Rainy River Represents Ilovitza, a mining project in which the entity has a royalty interest. Ilovitza [Member] Ilovitza Represents Rubicon Minerals Corporation. Rubicon Minerals Corporation [Member] Rubicon Minerals Corporation