v3.26.3
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended 123 Months Ended 147 Months Ended 195 Months Ended 383 Months Ended 474 Months Ended
May 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
 [7]
Dec. 31, 2025
Dec. 31, 2025
 [5]
Dec. 31, 2025
 [3]
Dec. 31, 2025
 [1]
Investor Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   16.37% 10.77% 11.62%         9.25%
Performance Inception Date Jun. 23, 1986                
Investor Shares | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions                
Average Annual Return, Percent   14.98% 9.39% 10.20%         8.29%
Investor Shares | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions and sale of Fund shares                
Average Annual Return, Percent   10.57% 8.79% 9.20%         6.95%
Institutional Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   16.65% 11.04% 11.88%   10.88% [2]      
Performance Inception Date Sep. 25, 2013                
Investor Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   17.62% 12.64% 16.38%       12.07%  
Performance Inception Date Feb. 03, 1994                
Investor Shares | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions                
Average Annual Return, Percent   17.62% 12.20% 15.24%       11.52%  
Investor Shares | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions and sale of Fund shares                
Average Annual Return, Percent   10.43% 9.95% 12.74%       10.31%  
Institutional Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   17.89% 12.91% 16.66%   15.37% [4]      
Performance Inception Date Sep. 25, 2013                
Investor Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   19.94% 5.13% 6.70%     3.31%    
Performance Inception Date Sep. 28, 2009                
Investor Shares | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions                
Average Annual Return, Percent   18.92% 4.68% 6.45%     3.14%    
Investor Shares | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions and sale of Fund shares                
Average Annual Return, Percent   12.11% 3.81% 5.31%     2.58%    
Institutional Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   20.24% 5.35% 6.91%   3.93% [6]      
Performance Inception Date Sep. 25, 2013                
Investor Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   5.97% 1.46% 2.39% 2.25%        
Performance Inception Date Sep. 28, 2015                
Institutional Shares                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return before taxes                
Average Annual Return, Percent   6.32% 1.71% 2.63% 2.50%        
Performance Inception Date Sep. 28, 2015                
Institutional Shares | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions                
Average Annual Return, Percent   4.68% 0.58% 1.55% 1.45%        
Institutional Shares | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return after taxes on distributions and sale of Fund shares                
Average Annual Return, Percent   3.69% 0.76% 1.44% 1.36%        
Bloomberg US Large Cap Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg US Large Cap Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   18.03% 14.00% 14.93%   14.16% [2],[4]      
Bloomberg 1000 Value Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg 1000 Value Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   16.53% 12.66% 11.07%   10.56% [2]      
Bloomberg 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   17.93% 13.60% 16.60%   15.93% [4]      
Bloomberg Emerging Markets Large, Mid & Small Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg Emerging Markets Large, Mid & Small Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   29.21% 4.54% 8.93%   6.20% [6]      
Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   8.17% (2.15%) 1.26% 1.14%        
Bloomberg Custom Sukuk Index (reflects no deduction for fees, expenses, or taxes)                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Bloomberg Custom Sukuk Index (reflects no deduction for fees, expenses, or taxes)                
Average Annual Return, Percent   7.45%        
[1] Amana Income Fund Investor Shares began operations June 23, 1986.
[2] Amana Income Fund Institutional Shares began operations September 25, 2013, and the Life of Fund return for the Bloomberg US Large Cap and Bloomberg 1000 Value Indexes is shown since this date.
[3] Amana Growth Fund Investor Shares began operations February 3, 1994.
[4] Amana Growth Fund Institutional Shares began operations September 25, 2013, and the Life of Fund return for the Bloomberg US Large Cap and Bloomberg 1000 Growth Indexes is shown since this date.
[5] Amana Developing World Fund Investor Shares began operations September 28, 2009.
[6] Amana Developing World Fund Institutional Shares began operations September 25, 2013, and the Life of Fund return for the Bloomberg Emerging Markets Large, Mid & Small Index is shown since this date.
[7] Amana Participation Fund began operations September 28, 2015.