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Pension and Profit Sharing Plans - Schedule of Reconciliation of Obligations and Fair Values of Plan Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Retirement Benefits [Abstract]      
Benefit Obligation at April 1, $ 33,909 $ 35,844  
Interest Cost on Projected Benefit Obligation 1,240 1,167 $ 1,216
Actuarial Gain (4,509) (1,776)  
Benefits Paid (1,451) (1,326)  
Benefit Obligation at March 31, 29,189 33,909 35,844
Fair Value of Plan Assets at April 1, 36,313 37,907  
Actual Return on Plan Assets (3,756) (268)  
Benefits Paid (1,451) (1,326)  
Fair Value of Plan Assets at March 31, 31,106 36,313 $ 37,907
Funded Status at March 31, 1,917 2,404  
Other Assets 1,917 2,404  
Accumulated Other Comprehensive Losses - Net Actuarial Loss 4,662 4,172  
Accumulated Other Comprehensive Losses 4,662 4,172  
Tax Impact (1,115) (997)  
Accumulated Other Comprehensive Losses, net of tax $ 3,547 $ 3,175