Product Recall - Impact of the Recall-Related Charges and Related Insurance Recoveries (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Product Recall Disclosure [Abstract]
Benefit to / (reduction of) net sales	$ 1,071	$ (1,096)
Benefit to / (incremental) cost of sales	628	(1,080)
Benefit to / (incremental) selling, general and administrative expenses	(24)	(171)
Total benefit to / (reduction of) income before income taxes	1,675	(2,347)
Benefit to / (reduction of) net income	$ 992	$ (1,364)
Benefit to / (reduction of) net income per diluted share	$ 0.06	$ (0.08)