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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate May 31, 2011
Registrant Name dei_EntityRegistrantName AMANA MUTUAL FUNDS TRUST
Central Index Key dei_EntityCentralIndexKey 0000766285
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Sep. 09, 2011
Document Effective Date dei_DocumentEffectiveDate Sep. 09, 2011
Prospectus Date rr_ProspectusDate Sep. 09, 2011
Amana Income Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Amana Income Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Current income and preservation of capital, consistent with Islamic principles. Current income is its primary objective.
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock preservation of capital, consistent with Islamic principles.
Fees and Expenses amft766285_FundFeesAndExpensesAbstract  
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy and hold shares of the Income Fund.
Shareowner Fees rr_ShareholderFeesAbstract  
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareowner Fees (fees paid directly from your investment)
Maximum sales charge (load) on purchases rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) on redemptions rr_MaximumDeferredSalesChargeOverOther none
Maximum sales charge (load) on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption fee (as a percentage of shares held less than 90 calendar days) rr_RedemptionFeeOverRedemption 2.00%
Exchange fee rr_ExchangeFeeOverRedemption none
Maximum account fee rr_MaximumAccountFeeOverAssets none
Annual Fund Operating Expenses rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees rr_ManagementFeesOverAssets 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.08%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.21%
Expenses Example rr_ExpenseExampleAbstract  
Expense Example [Heading] rr_ExpenseExampleHeading Expenses Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help investors compare the cost of investing in the Income Fund with the cost of investing in other mutual funds.

The example assumes an investor invests $10,000 in the Income Fund for the time periods indicated and then redeems all shares at the end of those periods. The example also assumes that the investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although actual costs may be higher or lower, based on these assumptions an investor’s expenses would be:
1 year rr_ExpenseExampleYear01 123
3 years rr_ExpenseExampleYear03 384
5 years rr_ExpenseExampleYear05 665
10 years rr_ExpenseExampleYear10 1,466
Portfolio Turnover Rate amft766285_PortfolioTurnoverAltAbstract  
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover Rate
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock During the most recent fiscal year, the Income Fund's portfolio turnover rate was 3% of the average value of its portfolio. The Fund buys and sells securities through Saturna Brokerage Services, Inc., a wholly-owned subsidiary of Saturna Capital, which presently charges no commissions on portfolio trades.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 3.00%
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Income Fund invests mainly in common stocks, including foreign stocks. Investment decisions are made in accordance with Islamic principles. The Fund diversifies its investments across industries and companies, and generally follows a value investment style. Common stock purchases are restricted to dividend-paying companies, which are expected to have more stable stock prices and tend to be larger companies.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The Income Fund invests mainly in common stocks, including foreign stocks.
Risk [Heading] rr_RiskHeading Principal Risks of Investing
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of Income Fund shares rises and falls as the value of the securities in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money. Fund share prices, yields, and total returns will change with the fluctuations in the securities markets as well as the fortunes of the industries and companies in which the Fund invests.

The Income Fund’s restricted ability to invest in certain market sectors, such as financial companies and conventional fixed-income securities, limits opportunities and may increase the risk of loss during economic downturns. Because Islamic principles preclude the use of interest-paying instruments, the Fund does not maximize current income because reserves remain in cash.

The Income Fund may invest in securities that are not traded in the United States when market conditions or investment opportunities arise that, in the adviser’s judgment, warrant such investment. Investments in the securities of foreign issuers may involve risks in addition to those normally associated with investments in the securities of U.S. issuers. All foreign investments are subject to risks of: (1) foreign political and economic instability; (2) adverse movements in foreign exchange rates; (3) currency devaluation; (4) the imposition or tightening of exchange controls or other limitations on repatriation of foreign capital; (5) changes in foreign governmental attitudes towards private investment, including potential nationalization, increased taxation or confiscation of assets; and (6) differing reporting, accounting, and auditing standards of foreign countries.
Risk Lose Money [Text] rr_RiskLoseMoney The value of Income Fund shares rises and falls as the value of the securities in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money.
Performance amft766285_FundPastPerformanceAbstract  
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide an indication of the risks of investing in the Income Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare to those of a broad-based market index. A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.

Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide an indication of the risks of investing in the Income Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare to those of a broad-based market index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.amanafunds.com
Annual Total Return rr_BarChartTableAbstract  
Bar Chart [Heading] rr_BarChartHeading Annual Total Return
2001 rr_AnnualReturn2001 (11.39%)
2002 rr_AnnualReturn2002 (15.85%)
2003 rr_AnnualReturn2003 28.56%
2004 rr_AnnualReturn2004 20.76%
2005 rr_AnnualReturn2005 12.15%
2006 rr_AnnualReturn2006 21.20%
2007 rr_AnnualReturn2007 14.12%
2008 rr_AnnualReturn2008 (23.48%)
2009 rr_AnnualReturn2009 23.54%
2010 rr_AnnualReturn2010 12.21%
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Best Quarter Q4 2003 16.4%

Worst Quarter Q3 2002 -16.5%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2011) was 6.82%.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2003
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.40%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2002
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.50%)
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 6.82%
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns for periods ended December 31, 2010
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor's tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates. In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Amana Income Fund | Return Before Taxes
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return before taxes
1 Year rr_AverageAnnualReturnYear01 12.21%
5 Years rr_AverageAnnualReturnYear05 7.97%
10 Years rr_AverageAnnualReturnYear10 6.66%
Amana Income Fund | Return after taxes on distributions
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 12.00%
5 Years rr_AverageAnnualReturnYear05 7.73%
10 Years rr_AverageAnnualReturnYear10 6.34%
Amana Income Fund | Return after taxes on distributions and sale of Fund shares
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 8.18%
5 Years rr_AverageAnnualReturnYear05 6.83%
10 Years rr_AverageAnnualReturnYear10 5.65%
Amana Income Fund | S&P 500 Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P 500 Index
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 15.06%
5 Years rr_AverageAnnualReturnYear05 2.29%
10 Years rr_AverageAnnualReturnYear10 1.41%
Amana Growth Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Amana Growth Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Long-term capital growth, consistent with Islamic principles.
Fees and Expenses amft766285_FundFeesAndExpensesAbstract  
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy and hold shares of the Growth Fund.
Shareowner Fees rr_ShareholderFeesAbstract  
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareowner Fees (fees paid directly from your investment)
Maximum sales charge (load) on purchases rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) on redemptions rr_MaximumDeferredSalesChargeOverOther none
Maximum sales charge (load) on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption fee (as a percentage of shares held less than 90 calendar days) rr_RedemptionFeeOverRedemption 2.00%
Exchange fee rr_ExchangeFeeOverRedemption none
Maximum account fee rr_MaximumAccountFeeOverAssets none
Annual Fund Operating Expenses rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees rr_ManagementFeesOverAssets 0.81%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.08%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14%
Expenses Example rr_ExpenseExampleAbstract  
Expense Example [Heading] rr_ExpenseExampleHeading Expenses Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help investors compare the cost of investing in the Growth Fund with the cost of investing in other mutual funds.

The example assumes an investor invests $10,000 in the Growth Fund for the time periods indicated and then redeems all shares at the end of those periods. The example also assumes that the investment has a 5% return each year and that the Fund's operating expenses remain the same. Although actual costs may be higher or lower, based on these assumptions an investor's expenses would be:
1 year rr_ExpenseExampleYear01 116
3 years rr_ExpenseExampleYear03 362
5 years rr_ExpenseExampleYear05 628
10 years rr_ExpenseExampleYear10 1,386
Portfolio Turnover Rate amft766285_PortfolioTurnoverAltAbstract  
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover Rate
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock During the most recent fiscal year, the Growth Fund's portfolio turnover rate was 5% of the average value of its portfolio. The Fund buys and sells securities through Saturna Brokerage Services, Inc., a wholly-owned subsidiary of Saturna Capital, which presently charges no commissions on portfolio trades.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 5.00%
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Growth Fund invests only in common stocks, including foreign stocks. Investment decisions are made in accordance with Islamic principles. The Fund diversifies its investments across industries and companies, and generally follows a value investment style. The Fund favors companies expected to grow earnings and stock prices faster than the economy, and tend to be smaller and less seasoned companies.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The Growth Fund invests only in common stocks, including foreign stocks.
Risk [Heading] rr_RiskHeading Principal Risks of Investing
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of Growth Fund shares rises and falls as the value of the stocks in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money. Fund share prices, yields, and total returns will change with the fluctuations in the securities markets as well as the fortunes of the industries and companies in which the Fund invests.

The smaller and less seasoned companies that may be in the Growth Fund have a greater risk of price volatility. Growth stocks, which can be priced on future expectations rather than current results, may decline substantially when expectations are not met or general market conditions weaken.

The Growth Fund’s restricted ability to invest in certain market sectors, such as financial companies and fixed-income securities, limits opportunities and may increase the risk of loss during economic downturns. Because Islamic principles preclude the use of interest-paying instruments, the Fund does not maximize current income because reserves remain in cash.

The Growth Fund may invest in securities that are not traded in the United States when market conditions or investment opportunities arise that, in the adviser’s judgment, warrant such investment. Investments in the securities of foreign issuers may involve risks in addition to those normally associated with investments in the securities of U.S. issuers. All foreign investments are subject to risks of: (1) foreign political and economic instability; (2) adverse movements in foreign exchange rates; (3) currency devaluation; (4) the imposition or tightening of exchange controls or other limitations on repatriation of foreign capital; (5) changes in foreign governmental attitudes towards private investment, including potential nationalization, increased taxation or confiscation of assets; and (6) differing reporting, accounting, and auditing standards of foreign countries.
Risk Lose Money [Text] rr_RiskLoseMoney The value of Growth Fund shares rises and falls as the value of the stocks in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money.
Performance amft766285_FundPastPerformanceAbstract  
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide an indication of the risks of investing in the Growth Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare to those of a broad-based market index. A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.

Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide an indication of the risks of investing in the Growth Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare to those of a broad-based market index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.amanafunds.com
Annual Total Return rr_BarChartTableAbstract  
Bar Chart [Heading] rr_BarChartHeading Annual Total Return
2001 rr_AnnualReturn2001 (14.75%)
2002 rr_AnnualReturn2002 (25.17%)
2003 rr_AnnualReturn2003 33.96%
2004 rr_AnnualReturn2004 23.04%
2005 rr_AnnualReturn2005 20.20%
2006 rr_AnnualReturn2006 15.41%
2007 rr_AnnualReturn2007 12.24%
2008 rr_AnnualReturn2008 (29.66%)
2009 rr_AnnualReturn2009 32.40%
2010 rr_AnnualReturn2010 15.92%
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Best Quarter Q4 2001 18.2%

Worst Quarter Q3 2002 -18.7%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2011) was 3.28%.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2001
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.20%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2002
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.70%)
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 3.28%
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns for periods ended December 31, 2010
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The Fund is replacing the Russell 2000 Index with the S&P 500 Index used in these comparisons to better reflect the makeup of its portfolio.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor’s tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates. In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged The Fund is replacing the Russell 2000 Index with the S&P 500 Index used in these comparisons to better reflect the makeup of its portfolio.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Amana Growth Fund | Return Before Taxes
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return before taxes
1 Year rr_AverageAnnualReturnYear01 15.92%
5 Years rr_AverageAnnualReturnYear05 6.94%
10 Years rr_AverageAnnualReturnYear10 5.86%
Amana Growth Fund | Return after taxes on distributions
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 15.91%
5 Years rr_AverageAnnualReturnYear05 6.89%
10 Years rr_AverageAnnualReturnYear10 5.84%
Amana Growth Fund | Return after taxes on distributions and sale of Fund shares
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 10.35%
5 Years rr_AverageAnnualReturnYear05 5.99%
10 Years rr_AverageAnnualReturnYear10 5.14%
Amana Growth Fund | S&P 500 Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P 500 Index
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 15.06%
5 Years rr_AverageAnnualReturnYear05 2.29%
10 Years rr_AverageAnnualReturnYear10 1.41%
Amana Growth Fund | Russell 2000 Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Russell 2000 Index
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.86%
5 Years rr_AverageAnnualReturnYear05 4.48%
10 Years rr_AverageAnnualReturnYear10 6.37%
Amana Developing World Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Amana Developing World Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock Long-term capital growth, consistent with Islamic principles.
Fees and Expenses amft766285_FundFeesAndExpensesAbstract  
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may expect to pay if you buy and hold shares of the Developing World Fund.
Shareowner Fees rr_ShareholderFeesAbstract  
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareowner Fees (fees paid directly from your investment)
Maximum sales charge (load) on purchases rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) on redemptions rr_MaximumDeferredSalesChargeOverOther none
Maximum sales charge (load) on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption fee (as a percentage of shares held less than 90 calendar days) rr_RedemptionFeeOverRedemption 2.00%
Exchange fee rr_ExchangeFeeOverRedemption none
Maximum account fee rr_MaximumAccountFeeOverAssets none
Annual Fund Operating Expenses rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees rr_ManagementFeesOverAssets 0.95%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.41%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.61%
Expenses Example rr_ExpenseExampleAbstract  
Expense Example [Heading] rr_ExpenseExampleHeading Expenses Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help investors compare the cost of investing in the Developing World Fund with the cost of investing in other mutual funds.

The example assumes an investor invests $10,000 in the Developing World Fund for the time periods indicated and then redeems all shares at the end of those periods. The example also assumes that the investment has a 5% return each year and that the Fund's operating expenses remain the same. Although actual costs may be higher or lower, based on these assumptions an investor's expenses would be:
1 year rr_ExpenseExampleYear01 164
3 years rr_ExpenseExampleYear03 508
5 years rr_ExpenseExampleYear05 876
10 years rr_ExpenseExampleYear10 1,911
Portfolio Turnover Rate amft766285_PortfolioTurnoverAltAbstract  
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover Rate
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

During the most recent fiscal year, the Developing World Fund's portfolio turnover rate was 2% of the average value of its portfolio. The Fund generally buys and sells securities through Saturna Brokerage Services, Inc., a wholly-owned subsidiary of Saturna Capital, which presently charges no commissions on portfolio trades.

The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio) through other brokerage firms. A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 2.00%
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Developing World Fund only buys stocks of companies with significant exposure (50% or more of assets or revenues) to countries with developing economies and/or markets. Investment decisions are made in accordance with Islamic principles. The Fund diversifies its investments across the countries of the developing world, industries, and companies, and generally follows a value investment style.

In determining whether a country is part of the developing world, the adviser will consider such factors as the country's per capita gross domestic product, the percentage of the country's economy that is industrialized, market capitalization as a percentage of gross domestic product, the overall regulatory environment, and limits on foreign ownership and restrictions on repatriation of initial capital or income.

By allowing investments in companies headquartered in more advanced economies yet having the majority of assets or revenues in the developing world, the Developing World Fund seeks to reduce its foreign investing risk.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The Developing World Fund only buys stocks of companies with significant exposure (50% or more of assets or revenues) to countries with developing economies and/or markets.
Risk [Heading] rr_RiskHeading Principal Risks of Investing
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of Developing World Fund shares rises and falls as the value of the stocks in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money. Fund share prices, yields, and total returns will change with the fluctuations in the securities and currency markets as well as the fortunes of the industries and companies in which the Fund invests.

The Developing World Fund’s restricted ability to invest in certain market sectors, such as financial companies and conventional fixed-income securities, limits opportunities and may increase the risk of loss during economic downturns. Because Islamic principles preclude the use of interest-paying instruments, the Fund does not maximize current income because reserves remain in cash.

The Developing World Fund involves risks not typically associated with investing in U.S. securities. These include fluctuations in currency exchange rates, currency devaluation, less public information about securities, less governmental market supervision, and lack of uniform financial, accounting, social and political standards.

Investments in the securities of foreign issuers may involve risks in addition to those normally associated with investments in the securities of U.S. issuers. All foreign investments are subject to risks of: (1) foreign political and economic instability; (2) adverse movements in foreign exchange rates; (3) currency devaluation; (4) the imposition or tightening of exchange controls or other limitations on repatriation of foreign capital; (5) changes in foreign governmental attitudes towards private investment, including potential nationalization, increased taxation or confiscation of assets, and (6) differing reporting, accounting, and auditing standards of foreign countries. The risks of foreign investing are generally magnified in the smaller and more volatile securities markets of the developing world.

Risk Lose Money [Text] rr_RiskLoseMoney The value of Developing World Fund shares rises and falls as the value of the stocks in which the Fund invests goes up and down. Only consider investing in the Fund if you are willing to accept the risk that you may lose money.
Performance amft766285_FundPastPerformanceAbstract  
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table provide an indication of the risks of investing in the Developing World Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for the previous one year and since the Fund's inception on September 28, 2009, compare to those of a broad-based market index. A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.

Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide an indication of the risks of investing in the Developing World Fund by showing changes in performance from year to year and by showing how the Fund's average annual returns for the previous one year and since the Fund's inception on September 28, 2009, compare to those of a broad-based market index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Performance data current to the most recent month-end and quarter-end are available on www.amanafunds.com.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.amanafunds.com
Annual Total Return rr_BarChartTableAbstract  
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns
2009 rr_AnnualReturn2009 3.10% [1]
2010 rr_AnnualReturn2010 5.63%
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Best Quarter Q3 2010 5.4%

Worst Quarter Q2 2010 -1.4%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2011) was -0.37%.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.40%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.40%)
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.37%)
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns for periods ended December 31, 2010
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor's tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates. In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and likely differ from those shown. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In loss periods, the average after-tax total return may be higher than average annual total return because of an assumed deduction of losses from other income.
Amana Developing World Fund | Return Before Taxes
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return before taxes
1 Year rr_AverageAnnualReturnYear01 5.63%
Since Inception rr_AverageAnnualReturnSinceInception 7.01%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2009
Amana Developing World Fund | Return after taxes on distributions
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 5.63%
Since Inception rr_AverageAnnualReturnSinceInception 7.01%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2009
Amana Developing World Fund | Return after taxes on distributions and sale of Fund shares
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 3.66%
Since Inception rr_AverageAnnualReturnSinceInception 5.97%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2009
Amana Developing World Fund | Morgan Stanley Capital International (MSCI) Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Morgan Stanley Capital International (MSCI) Index
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 19.04%
Since Inception rr_AverageAnnualReturnSinceInception 23.66%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2009
[1] For the period September 28, 2009 (the inception of the fund) through December 31, 2010 and not annualized.