110001 - Disclosure - Alger Spectra Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 110002 - Disclosure - Alger Spectra Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 110003 - Disclosure - Alger Spectra Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 110004 - Disclosure - Alger Spectra Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 110005 - Disclosure - Alger Spectra Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 120010 - Disclosure - Alger Spectra Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 120020 - Disclosure - Alger Spectra Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 120030 - Disclosure - Alger Spectra Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 120040 - Disclosure - Alger Spectra Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 120045 - Disclosure - Alger Spectra Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 120050 - Disclosure - Alger Spectra Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 120060 - Disclosure - Alger Spectra Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 120070 - Disclosure - Alger Spectra Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 110000 - Disclosure - Alger Spectra Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 210001 - Disclosure - Alger Responsible Investing Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 210002 - Disclosure - Alger Responsible Investing Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 210003 - Disclosure - Alger Responsible Investing Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 210004 - Disclosure - Alger Responsible Investing Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 210005 - Disclosure - Alger Responsible Investing Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 220010 - Disclosure - Alger Responsible Investing Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 220020 - Disclosure - Alger Responsible Investing Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 220030 - Disclosure - Alger Responsible Investing Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 220040 - Disclosure - Alger Responsible Investing Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 220045 - Disclosure - Alger Responsible Investing Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 220050 - Disclosure - Alger Responsible Investing Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 220060 - Disclosure - Alger Responsible Investing Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 220070 - Disclosure - Alger Responsible Investing Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 210000 - Disclosure - Alger Responsible Investing Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 310001 - Disclosure - Alger Dynamic Opportunities Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 310002 - Disclosure - Alger Dynamic Opportunities Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 310003 - Disclosure - Alger Dynamic Opportunities Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 310004 - Disclosure - Alger Dynamic Opportunities Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 310005 - Disclosure - Alger Dynamic Opportunities Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 320010 - Disclosure - Alger Dynamic Opportunities Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 320020 - Disclosure - Alger Dynamic Opportunities Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 320030 - Disclosure - Alger Dynamic Opportunities Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 320040 - Disclosure - Alger Dynamic Opportunities Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 320045 - Disclosure - Alger Dynamic Opportunities Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 320050 - Disclosure - Alger Dynamic Opportunities Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 320060 - Disclosure - Alger Dynamic Opportunities Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 320070 - Disclosure - Alger Dynamic Opportunities Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 310000 - Disclosure - Alger Dynamic Opportunities Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 410001 - Disclosure - Alger Emerging Markets Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 410002 - Disclosure - Alger Emerging Markets Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 410003 - Disclosure - Alger Emerging Markets Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 410004 - Disclosure - Alger Emerging Markets Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 410005 - Disclosure - Alger Emerging Markets Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 420010 - Disclosure - Alger Emerging Markets Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 420020 - Disclosure - Alger Emerging Markets Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 420030 - Disclosure - Alger Emerging Markets Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 420040 - Disclosure - Alger Emerging Markets Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 420045 - Disclosure - Alger Emerging Markets Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 420050 - Disclosure - Alger Emerging Markets Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 420060 - Disclosure - Alger Emerging Markets Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 420070 - Disclosure - Alger Emerging Markets Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 410000 - Disclosure - Alger Emerging Markets Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 510001 - Disclosure - Alger Spectra Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 510002 - Disclosure - Alger Spectra Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 510003 - Disclosure - Alger Spectra Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 510004 - Disclosure - Alger Spectra Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 510005 - Disclosure - Alger Spectra Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 520010 - Disclosure - Alger Spectra Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 520020 - Disclosure - Alger Spectra Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 520030 - Disclosure - Alger Spectra Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 520040 - Disclosure - Alger Spectra Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 520045 - Disclosure - Alger Spectra Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 520050 - Disclosure - Alger Spectra Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 520060 - Disclosure - Alger Spectra Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 520070 - Disclosure - Alger Spectra Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 510000 - Disclosure - Alger Spectra Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 610001 - Disclosure - Alger Spectra Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 610002 - Disclosure - Alger Spectra Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 610003 - Disclosure - Alger Spectra Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 610004 - Disclosure - Alger Spectra Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 610005 - Disclosure - Alger Spectra Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 620010 - Disclosure - Alger Spectra Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 620020 - Disclosure - Alger Spectra Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 620030 - Disclosure - Alger Spectra Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 620040 - Disclosure - Alger Spectra Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 620045 - Disclosure - Alger Spectra Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 620050 - Disclosure - Alger Spectra Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 620060 - Disclosure - Alger Spectra Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 620070 - Disclosure - Alger Spectra Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 610000 - Disclosure - Alger Spectra Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 710001 - Disclosure - Alger Spectra Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 710002 - Disclosure - Alger Spectra Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 710003 - Disclosure - Alger Spectra Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 710004 - Disclosure - Alger Spectra Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 710005 - Disclosure - Alger Spectra Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 720010 - Disclosure - Alger Spectra Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 720020 - Disclosure - Alger Spectra Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 720030 - Disclosure - Alger Spectra Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 720040 - Disclosure - Alger Spectra Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 720045 - Disclosure - Alger Spectra Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 720050 - Disclosure - Alger Spectra Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 720060 - Disclosure - Alger Spectra Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 720070 - Disclosure - Alger Spectra Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 710000 - Disclosure - Alger Spectra Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 810001 - Disclosure - Alger Responsible Investing Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 810002 - Disclosure - Alger Responsible Investing Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 810003 - Disclosure - Alger Responsible Investing Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 810004 - Disclosure - Alger Responsible Investing Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 810005 - Disclosure - Alger Responsible Investing Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 820010 - Disclosure - Alger Responsible Investing Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 820020 - Disclosure - Alger Responsible Investing Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 820030 - Disclosure - Alger Responsible Investing Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 820040 - Disclosure - Alger Responsible Investing Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 820045 - Disclosure - Alger Responsible Investing Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 820050 - Disclosure - Alger Responsible Investing Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 820060 - Disclosure - Alger Responsible Investing Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 820070 - Disclosure - Alger Responsible Investing Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 810000 - Disclosure - Alger Responsible Investing Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 910001 - Disclosure - Alger Responsible Investing Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 910002 - Disclosure - Alger Responsible Investing Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 910003 - Disclosure - Alger Responsible Investing Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 910004 - Disclosure - Alger Responsible Investing Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 910005 - Disclosure - Alger Responsible Investing Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 920010 - Disclosure - Alger Responsible Investing Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 920020 - Disclosure - Alger Responsible Investing Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 920030 - Disclosure - Alger Responsible Investing Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 920040 - Disclosure - Alger Responsible Investing Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 920045 - Disclosure - Alger Responsible Investing Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 920050 - Disclosure - Alger Responsible Investing Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 920060 - Disclosure - Alger Responsible Investing Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 920070 - Disclosure - Alger Responsible Investing Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 910000 - Disclosure - Alger Responsible Investing Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1010001 - Disclosure - Alger Dynamic Opportunities Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1010002 - Disclosure - Alger Dynamic Opportunities Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1010003 - Disclosure - Alger Dynamic Opportunities Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1010004 - Disclosure - Alger Dynamic Opportunities Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 1010005 - Disclosure - Alger Dynamic Opportunities Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 1020010 - Disclosure - Alger Dynamic Opportunities Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1020020 - Disclosure - Alger Dynamic Opportunities Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1020030 - Disclosure - Alger Dynamic Opportunities Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 1020040 - Disclosure - Alger Dynamic Opportunities Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1020045 - Disclosure - Alger Dynamic Opportunities Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 1020050 - Disclosure - Alger Dynamic Opportunities Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1020060 - Disclosure - Alger Dynamic Opportunities Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1020070 - Disclosure - Alger Dynamic Opportunities Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1010000 - Disclosure - Alger Dynamic Opportunities Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1110001 - Disclosure - Alger Emerging Markets Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1110002 - Disclosure - Alger Emerging Markets Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1110003 - Disclosure - Alger Emerging Markets Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1110004 - Disclosure - Alger Emerging Markets Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 1110005 - Disclosure - Alger Emerging Markets Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 1120010 - Disclosure - Alger Emerging Markets Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1120020 - Disclosure - Alger Emerging Markets Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1120030 - Disclosure - Alger Emerging Markets Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 1120040 - Disclosure - Alger Emerging Markets Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1120045 - Disclosure - Alger Emerging Markets Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 1120050 - Disclosure - Alger Emerging Markets Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1120060 - Disclosure - Alger Emerging Markets Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1120070 - Disclosure - Alger Emerging Markets Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1110000 - Disclosure - Alger Emerging Markets Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1210001 - Disclosure - Alger Emerging Markets Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1210002 - Disclosure - Alger Emerging Markets Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1210003 - Disclosure - Alger Emerging Markets Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1210004 - Disclosure - Alger Emerging Markets Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 1210005 - Disclosure - Alger Emerging Markets Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 1220010 - Disclosure - Alger Emerging Markets Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1220020 - Disclosure - Alger Emerging Markets Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1220030 - Disclosure - Alger Emerging Markets Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 1220040 - Disclosure - Alger Emerging Markets Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1220045 - Disclosure - Alger Emerging Markets Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 1220050 - Disclosure - Alger Emerging Markets Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1220060 - Disclosure - Alger Emerging Markets Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1220070 - Disclosure - Alger Emerging Markets Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1210000 - Disclosure - Alger Emerging Markets Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink Alger Spectra Fund S000009190 [Member] Class A C Shares [Member] Class A C000024978 [Member] Class C C000068367 [Member] Russell 3000 Growth Index (reflects no deductions for fees, expenses or taxes)[Member] S&P 500 Index (reflects no deductions for fees, expenses or taxes)[Member] Investment Risk [Member] Market Risk [Member] Equity Securities Risk [Member] Growth Securities Risk [Member] Short Sales Risk [Member] Sector Risk [Member] Information Technology Sector Risk [Member] Consumer Discretionary Sector Risk [Member] Communication Services Sector Risk [Member] Privately Placed Securities Risk [Member] Foreign Securities Risk [Member] Leverage Risk [Member] Cash Position Risk [Member] Alger Responsible Investing Fund S000014607 [Member] C000039961 [Member] C000068369 [Member] Russell 1000 Growth Index (reflects no deductions for fees, expenses or taxes)[Member] Environmental Social and or Governance Sustainability-Related Securities Risk [Member] Alger Dynamic Opportunities Fund S000026226 [Member] C000078761 [Member] C000098121 [Member] HFRI Equity Hedge (Total) Index (reflects no deductions for fees, expenses or taxes)[Member] Options Risk [Member] Health Care Sector Risk [Member] Convertible Securities Risk [Member] Small Cap Securities Risk [Member] Portfolio Turnover Active Trading Risk [Member] Alger Emerging Markets Fund S000030688 [Member] C000095099 [Member] C000095100 [Member] MSCI Emerging Markets Gross Index (reflects no deductions for fees, expenses or taxes)[Member] Emerging Markets Risk [Member] Frontier Markets Risk [Member] Financials Sector Risk [Member] Industrials Sector Risk [Member] Small Number of Holdings Risk [Member] Class I Shares [Member] Class I C000068368 [Member] Class Y Shares [Member] Class Y C000206605 [Member] Class Z Shares [Member] Class Z C000095102 [Member] C000068370 [Member] C000174226 [Member] C000095104 [Member] C000095101 [Member] C000138115 [Member]