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Pension and Profit Sharing Plans - Additional information (Detail)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Employee
CompensationPlan
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan, payments for settlement $ 3,900   $ 3,857    
Settlement cost $ 600   649    
Costs relating to employer discretionary contributions   $ 8,000 8,400 $ 6,400  
Current actuarial estimates contributions     600 600 $ 300
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 ending date   Mar. 31, 2020      
Expenses related to Multi employer plans   $ 1,800 $ 1,500 $ 1,600 $ 1,600
Salaried Employees [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Employees fully vesting in employer's own contributions made beginning in 2007, requirement years   6 years      
Hourly Employees [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Employees fully vesting in employer's own contributions made beginning in 2007, requirement years   3 years      
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