Retirement Plans - Summary Changes in Plan Assets and Benefit Obligations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Changes in plan assets and benefit obligations:
New prior service cost	$ 255	$ 0	$ 0
Net loss (gain) arising during the year	2,262	6,376	7,757
Effect of exchange rates on amounts included in AOCI	920	(392)	(176)
Amounts recognized as a component of net periodic benefit costs:
Amortization of prior service cost	(81)	(79)	(83)
Amortization or settlement recognition of net loss	(694)	(523)	(187)
Total recognized in other comprehensive income	$ 2,662	$ 5,382	$ 7,311