v3.26.1
Noncontrolling Interest - Schedule of Changes in Ownership (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Noncontrolling Interest [Abstract]    
Net income attributable to Black Rock Coffee Bar, Inc. $ 378 $ 0
Transfers from the noncontrolling interest    
Increase in additional paid-in capital as a result of the redemption of LLC Units 998  
Change from net income attributable to Black Rock Coffee Bar, Inc. and transfers from noncontrolling interest $ 1,376