Retirement Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Expected cash contributions to pension plans in 2014	$ 2,590
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Employer expenses	$ 503	$ 494
United States Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Equity investments target range, minimum	40.00%
Equity investments target range, maximum	75.00%
International Plans
Defined Benefit Plan Disclosure [Line Items]
Employer expenses	$ 1,865	1,640
International Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	65.00%
Defined Contribution Pension
Defined Benefit Plan Disclosure [Line Items]
Employer expenses	$ 8,931	$ 7,447	$ 6,730