v3.26.3
Annual Total Returns
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Brown Advisory Growth Equity Fund | Brown Advisory Growth Equity Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 1.66% 17.07% 33.77% (33.68%) 18.89% 32.37% 40.48% 5.01% 30.43% (3.02%)
Brown Advisory Flexible Equity Fund | Brown Advisory Flexible Equity Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 9.75% 23.73% 34.47% (21.09%) 24.99% 19.85% 36.33% (4.07%) 24.12% 9.37%
Brown Advisory Sustainable Growth Fund | Brown Advisory Sustainable Growth Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 3.46% 20.22% 38.88% (31.02%) 29.88% 38.88% 34.88% 4.45% 27.90% 5.52%
Brown Advisory Small-Cap Growth Fund | Brown Advisory Small‑Cap Growth Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 2.38% 4.34% 12.43% (20.34%) 7.44% 31.76% 33.49% (4.36%) 16.91% 9.55%
Brown Advisory Small‑Cap Fundamental Value Fund | Brown Advisory Small‑Cap Fundamental Value Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 5.73% 11.87% 16.00% (8.77%) 31.11% (5.70%) 23.99% (13.29%) 12.20% 21.86%
Brown Advisory Sustainable Small-Cap Core Fund | Brown Advisory Sustainable Small-Cap Core Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 9.45% 6.81% 17.39% (20.21%)            
Brown Advisory Sustainable Value Fund | Brown Advisory Sustainable Value Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 15.69% 17.23%                
Brown Advisory Global Leaders Fund | Brown Advisory Global Leaders Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 14.95% 14.00% 26.00% (19.66%) 16.67% 20.26% 33.95% (2.58%) 33.99% (1.34%)
Brown Advisory Sustainable International Leaders Fund | Brown Advisory Sustainable International Leaders Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 15.28% 1.50% 15.76%              
Brown Advisory Intermediate Income Fund | Brown Advisory Intermediate Income Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 7.03% 2.11% 4.19% (9.39%) (1.20%) 5.42% 6.85% 0.41% 2.39% 2.24%
Brown Advisory Sustainable Bond Fund | Brown Advisory Sustainable Bond Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 6.84% 0.93% 3.41% (13.45%) (0.39%) 8.87% 8.90% (0.57%)    
Brown Advisory Maryland Bond Fund | Brown Advisory Maryland Bond Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 4.72% 1.65% 5.74% (7.58%) 1.62% 2.33% 6.70% 1.44% 3.91% (0.07%)
Brown Advisory Tax-Exempt Bond Fund | Brown Advisory Tax-Exempt Bond Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 5.48% 2.38% 7.16% (8.87%) 2.79% 3.42% 7.48% 2.16% 4.92% 0.62%
Brown Advisory Tax-Exempt Sustainable Bond Fund | Brown Advisory Tax-Exempt Sustainable Bond Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 4.56% 2.29% 4.96% (8.81%) 2.55% 2.07%        
Brown Advisory Mortgage Securities Fund | Brown Advisory Mortgage Securities Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 7.98% 1.28% 4.34% (10.64%) (0.30%) 5.49% 6.93% 0.73% 2.35% 1.24%
Brown Advisory WMC Strategic European Equity Fund | Brown Advisory WMC Strategic European Equity Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 47.19% 10.84% 19.36% (11.96%) 14.60% 11.29% 23.52% (16.49%) 32.36% (2.28%)
Brown Advisory Emerging Markets Select Fund | Brown Advisory Emerging Markets Select Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 30.82% 7.99% 10.54% (15.21%) 1.55% 18.34% 16.75% (20.51%) 32.77% 4.61%
Brown Advisory Beutel Goodman Large-Cap Value Fund | Brown Advisory Beutel Goodman Large-Cap Value Fund Institutional Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 5.27% 11.53% 12.29% 2.05% 14.74% 11.51% 29.90%      
Brown Advisory WMC Japan Equity Fund | Brown Advisory WMC Japan Equity Fund Investor Shares                    
Prospectus [Line Items]                    
Annual Return [Percent] 28.42%