v3.26.1
Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
TWEEDY, BROWNE INTERNATIONAL VALUE FUND        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return before Taxes      
Average Annual Return, Percent   23.77% 8.81% 7.01%
TWEEDY, BROWNE INTERNATIONAL VALUE FUND | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return after Taxes on Distributions      
Average Annual Return, Percent   20.84% 7.04% 5.85%
TWEEDY, BROWNE INTERNATIONAL VALUE FUND | 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   16.61% 6.89% 5.59%
TWEEDY, BROWNE INTERNATIONAL VALUE FUND II - CURRENCY UNHEDGED        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return before Taxes      
Average Annual Return, Percent   26.59% 7.21% 6.19%
TWEEDY, BROWNE INTERNATIONAL VALUE FUND II - CURRENCY UNHEDGED | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return after Taxes on Distributions      
Average Annual Return, Percent   24.75% 6.03% 5.48%
TWEEDY, BROWNE INTERNATIONAL VALUE FUND II - CURRENCY UNHEDGED | 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   17.80% 5.74% 5.03%
TWEEDY, BROWNE VALUE FUND        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return before Taxes      
Average Annual Return, Percent   21.56% 9.23% 7.78%
TWEEDY, BROWNE VALUE FUND | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return after Taxes on Distributions      
Average Annual Return, Percent   20.64% 7.35% 6.01%
TWEEDY, BROWNE VALUE FUND | 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   13.67% 7.09% 5.94%
TWEEDY, BROWNE . BUYBACKS . DIVIDENDS + VALUE FUND        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return before Taxes      
Average Annual Return, Percent   21.70% 6.47% 6.45%
TWEEDY, BROWNE . BUYBACKS . DIVIDENDS + VALUE FUND | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return after Taxes on Distributions      
Average Annual Return, Percent   19.63% 4.21% 4.19%
TWEEDY, BROWNE . BUYBACKS . DIVIDENDS + VALUE FUND | 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   14.65% 4.90% 4.86%
MSCI EAFE Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] MSCI EAFE Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   31.22% 8.92% 8.18%
MSCI EAFE Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] MSCI EAFE Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   23.10% 13.94% 10.72%
MSCI World Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] MSCI World Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   21.09% 12.15% 12.17%
MSCI World Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] MSCI World Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   19.03% 13.67% 12.99%
S&P 500/MSCI World Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] S&P 500/MSCI World Index (Hedged to U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   19.03% 13.67% 12.99%
MSCI World High Dividend Yield Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] MSCI World High Dividend Yield Index (in U.S.$) (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   18.64% 9.05% 8.52%