Net Periodic Benefit Cost Related to Defined Benefit Pension Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 349	$ 285	$ 250
Interest cost	649	668	646
Expected return on plan assets	(756)	(706)	(624)
Amortization and deferral	393	238	248
Net periodic benefit cost	635	485	520
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	679	645	603
Interest cost	2,377	2,504	2,503
Expected return on plan assets	(1,851)	(1,787)	(1,615)
Amortization and deferral	209	32	53
Net periodic benefit cost	$ 1,414	$ 1,394	$ 1,544