v3.26.3
Borrowings - Summary of Borrowings (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Private Banker's Bank        
Line of Credit Facility [Line Items]        
Maximum amount outstanding at any month-end during the period $ 0 $ 0 $ 0 $ 0
FHLB of Topeka        
Line of Credit Facility [Line Items]        
Average balance outstanding 0 3,091 0 1,621
Maximum amount outstanding at any month-end during the period 0 8,500 0 8,500
Federal Reserve Bank Advances        
Line of Credit Facility [Line Items]        
Maximum amount outstanding at any month-end during the period 0 0 0 0
Federal Home Loan Bank Of Topeka and Private Banker's Bank        
Line of Credit Facility [Line Items]        
Maximum amount outstanding at any month-end during the period $ 0 $ 8,500 $ 0 $ 8,500
Average interest rate during the period   4.53%   4.57%