INCOME TAXES Components of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Current income tax expense:
Federal	$ 20,123	$ 15,826	$ 10,585
State	2,260	2,266	1,421
Foreign	1,174	1,035	1,032
Current income tax expense, Total	23,557	19,127	13,038
Deferred income tax expense (benefit):
Federal	5,347	5,161	5,603
State	96	320	44
Foreign	(250)	(1,481)	(195)
Deferred income tax expense (benefit), Total	5,193	4,000	5,452
Income tax expense (benefit), Total	$ 28,750	$ 23,127	$ 18,490