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Retirement Plans - Change in Projected Benefit Obligations and Change in Plan Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
United States Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at the beginning of the period $ 16,713 $ 16,682  
Service cost 0 0 $ 371
Interest cost 631 658 664
Benefits paid, inclusive of plan expenses (1,061) (1,037)  
Plan curtailments and settlements 0 0  
Experience loss 364 410  
Foreign currency translation adjustment 0 0  
Benefit obligation at the end of the period 16,647 16,713 16,682
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at the beginning of the period 13,928 12,731  
Actual return on plan assets 758 1,731  
Employer contributions 138 503  
Benefits paid, inclusive of plan expenses (1,061) (1,037)  
Defined Benefit Plan, Settlements and Curtailments, Plan Assets 0 0  
Foreign currency translation adjustment 0 0  
Fair value of plan assets at the end of the period 13,763 13,928 12,731
Funded status deficit (2,884)   (2,785)
International Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at the beginning of the period 82,033 74,478  
Service cost 997 1,025 871
Interest cost 1,831 1,795 1,848
Benefits paid, inclusive of plan expenses (1,758) (2,153)  
Plan curtailments and settlements (1,130) (52)  
Experience loss (261) (2,705)  
Foreign currency translation adjustment (6,674) 9,645  
Benefit obligation at the end of the period 75,038 82,033 74,478
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at the beginning of the period 38,757 34,323  
Actual return on plan assets 2,109 688  
Employer contributions 1,670 1,865  
Benefits paid, inclusive of plan expenses (1,758) (2,153)  
Defined Benefit Plan, Settlements and Curtailments, Plan Assets (1,130) (52)  
Foreign currency translation adjustment (2,857) 4,086  
Fair value of plan assets at the end of the period 36,791 38,757 $ 34,323
Funded status deficit $ (38,247) $ (43,276)