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Leases - Schedule of Supplemental Cash Flow Information Related to Operating Leases (Detail) - USD ($)
6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Leases [Abstract]    
Cash paid for amounts included in the measurement of operating lease liabilities $ 4,699,000 $ 3,996,000
Operating lease liabilities arising from obtaining ROU assets 45,629,000 51,648,000
Finance lease liabilities arising from obtaining ROU assets 0 358,000
Additions to ROU assets resulting from additions to operating lease liabilities $ 1,389,000 $ 1,672,000