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Retirement Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet $ (41,949) $ (41,846)
Non current assets    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet 15 0
Accrued expenses    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet (1,514) (1,350)
Other liabilities    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet $ (40,450) $ (40,496)