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Retirement Plans - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions to pension plans in 2014 $ 1,640    
Defined Contribution Pension      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses 12,078 $ 8,931 $ 7,447
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses 138 503  
International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses $ 1,670 $ 1,865  
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%