Retirement Plans - Change in Projected Benefit Obligations and Change in Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
United States Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at the beginning of the period	$ 16,682	$ 17,649
Service cost	0	371	$ 482
Interest cost	658	664	682
Benefits paid, inclusive of plan expenses	(1,037)	(1,057)
Plan curtailments and settlements	0	0
Experience loss	410	(945)
Foreign currency translation adjustment	0	0
Benefit obligation at the end of the period	16,713	16,682	17,649
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the period	12,731	11,839
Actual return on plan assets	1,731	1,455
Employer contributions	503	494
Benefits paid, inclusive of plan expenses	(1,037)	(1,057)
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	13,928	12,731	11,839
Funded status deficit	(2,785)	(3,951)
International Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at the beginning of the period	74,478	69,134
Service cost	1,025	871	820
Interest cost	1,795	1,848	1,904
Benefits paid, inclusive of plan expenses	(2,153)	(1,982)
Plan curtailments and settlements	(52)	(17)
Experience loss	(2,705)	11,863
Foreign currency translation adjustment	9,645	(7,239)
Benefit obligation at the end of the period	82,033	74,478	69,134
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at the beginning of the period	34,323	32,314
Actual return on plan assets	688	6,669
Employer contributions	1,865	1,640
Benefits paid, inclusive of plan expenses	(2,153)	(1,982)
Defined Benefit Plan, Settlements and Curtailments, Plan Assets	(52)	(17)
Foreign currency translation adjustment	4,086	(4,301)
Fair value of plan assets at the end of the period	38,757	34,323	$ 32,314
Funded status deficit	$ (43,276)	$ (40,155)