Income Taxes - Summary of Consolidated Effective Tax Rates (Detail)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Statutory federal rate	35.00%	35.00%	35.00%
State income taxes after federal income tax	5.00%	9.30%	5.60%
Valuation allowance	(2.30%)	2.60%
Accounting for Stock Options	1.90%	2.70%	2.60%
Other	(2.60%)	(1.40%)	(1.10%)
Consolidated effective tax rate	37.00%	48.20%	42.10%