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Retirement Plans - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions to pension plans in 2014 $ 2,398    
Defined Contribution Pension      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses 15,835 $ 12,078 $ 8,931
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses 54 138  
International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses $ 2,098 $ 1,670  
International Plans | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation percentage 65.00%    
Minimum | United States Plans | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Equity investments target range, minimum 40.00%    
Maximum | United States Plans | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Equity investments target range, minimum 75.00%