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Pension and Profit Sharing Plans - Additional information (Detail)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Employee
CompensationPlan
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan, payments for settlement $ 3,900        
Settlement cost $ 600       $ 649
Employees fully vesting in employer's own contributions made beginning in 2007, requirement years     4 years    
Costs relating to employer discretionary contributions     $ 8,200 $ 8,000 8,400
Current actuarial estimates contributions     $ 700 600 600
Number of employees covered under multi-employer pension plans | Employee     50    
Number of multi-employer plans | CompensationPlan     3    
Collective bargaining agreement for employer covered under multi-employer plans, Expiration date, First     Feb. 29, 2024    
Collective bargaining agreement for employer covered under multi-employer plans, Expiration date, Last     Mar. 31, 2025    
Expenses related to multi employer plans     $ 1,700 $ 1,500 $ 1,600
Scenario Forecast [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Expenses related to multi employer plans   $ 1,800      
Minimum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Current actuarial estimates contributions for fiscal year 2020     500    
Maximum [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Current actuarial estimates contributions for fiscal year 2020     $ 1,000