Long-Term Debt Payable to Banks - Long-Term Debt Including Current Maturities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Debt Disclosure [Line Items]
Senior Credit Facility		$ 10,679
Less current maturities		2,464
Total long-term debt, net of current maturities		$ 8,215