Annual report [Section 13 and 15(d), not S-K Item 405]

Employee Benefit Plans - Changes in Company's Benefit Obligation, Plan Assets and Funded Status for Plan (Detail)

v3.26.1
Employee Benefit Plans - Changes in Company's Benefit Obligation, Plan Assets and Funded Status for Plan (Detail) - Pension Plans, Defined Benefit [Member] - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation at beginning of year $ 23,876 $ 25,042  
Service cost 253 252 $ 252
Interest cost 1,295 1,292 1,312
Actuarial gain (587) (384)  
Benefit payments (780) (868)  
Liability released through annuity purchase (1,056) (1,458)  
Projected benefit obligation at end of year 23,001 23,876 25,042
Change in fair value of plan assets      
Fair value of plan assets at beginning of year 29,826 31,438  
Actual return on plan assets 1,643 714  
Benefit and administrative expense payments (780) (868)  
Annuities purchased (1,056) (1,458)  
Fair value of plan assets at end of year 29,633 29,826 $ 31,438
Funded status      
Funded status at end of year 6,633 5,950  
Amount recognized in the Consolidated Balance Sheets $ 6,633 $ 5,950