Long-Term Debt Payable to Banks - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013
Line of Credit Facility [Line Items]
Senior credit facility	$ 33,000
Senior credit facility period	60 months
Quarterly principal payments	821
Maturity payment	6,571
Term-loan maturity period	August 2013
Term-loan paid	10,679
Unused borrowing commitment fee	0.375%
Senior Credit Facility Base Rate calculation	Higher of the Prime Rate or the Federal Funds Open Rate plus 0.50%
Senior Credit Facility margin	0.50%
Outstanding letters of credit	202
Revolver availability	9,798
Fixed charge coverage ratio, Minimum	Not less than 1.25 1.0
Fixed charge leverage ratio, Maximum	Not more than 2.5 1.0
Minimum [Member]
Line of Credit Facility [Line Items]
Applicable margins for Base Rate based borrowings	0.00%
Applicable margins for LIBOR-based borrowings	1.25%
Maximum [Member]
Line of Credit Facility [Line Items]
Applicable margins for Base Rate based borrowings	0.75%
Applicable margins for LIBOR-based borrowings	2.25%
Revolver [Member]
Line of Credit Facility [Line Items]
Senior credit facility	10,000
Senior Credit Facility [Member]
Line of Credit Facility [Line Items]
Senior credit facility	$ 23,000