Income Taxes - Schedule of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Current expense:
Federal	$ 893	$ 1,080
State	175	333	44
Total current income tax expense	1,068	1,413	44
Deferred	2,560	2,063	2,697
Change in valuation allowance	(318)	318
Total deferred income tax expense	2,242	2,381	2,697
Total income tax expense	$ 3,310	$ 3,794	$ 2,741