Line of Credit and Long-Term Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended		0 Months Ended					1 Months Ended					1 Months Ended
	Nov. 01, 2012	Dec. 31, 2013 Tranches	Dec. 31, 2012	Jun. 30, 2012	Jan. 11, 2012	Nov. 01, 2012 Senior Secured Term Loan B	Apr. 18, 2007 Senior Secured Term Loan B	Apr. 03, 2013 Industrial Revenue Bond	Dec. 31, 2012 Industrial Revenue Bond	Nov. 01, 2012 Tranche A	Dec. 31, 2013 Tranche A Minimum	Dec. 31, 2013 Tranche A Maximum	Nov. 01, 2012 Tranche A Base Rate	Nov. 01, 2012 Tranche A London Interbank Offered Rate (LIBOR)	Nov. 01, 2012 Tranche A-1	Dec. 31, 2013 Tranche A-1 Minimum	Dec. 31, 2013 Tranche A-1 Maximum	Nov. 01, 2012 Tranche A-1 Base Rate	Nov. 01, 2012 Tranche A-1 London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Senior secured revolving credit facility	$ 61,000,000			$ 55,000,000						$ 55,000,000					$ 6,000,000
Line of credit maturity date	Nov. 01, 2017			Jan. 13, 2013
Additional permitted borrowings under Tranche A	15,000,000
Increments of additional permitted borrowings under Tranche A	2,500,000
Credit Facility extended maximum limit	70,000,000
Credit Facility Tranches		2
Revolving credit facility period	5 years
Minimum excess availability on borrowing base	10.00%
Applicable margin rate													0.50%	1.50%				2.00%	3.00%
Unused line fee under the Credit Facility	0.25%
Credit Facility Description of Variable Rate Basis	The interest rate on outstanding borrowings is equal to, at the Company’s election, either (1) the lender’s base rate plus the applicable margin, or (2) a LIBOR rate plus the applicable margin. The applicable margin for base rate borrowings is 0.50% for Tranche A borrowings and 2.00% for Tranche A-1 borrowings. The applicable margin for LIBOR rate borrowings is 1.50% for Tranche A borrowings and 3.00% for Tranche A-1 borrowings. Tranche A-1 borrowings are deemed to be the first loans made and the last loans repaid.
Payments of Financing Costs			790,000
Deferred finance costs					988,000
Letters of credit		7,211,000	5,060,000
Line of credit availability		51,806,000	47,622,000
Borrowings interest rate											1.67%	3.75%				3.17%	5.25%
Line of credit, outstanding borrowings		815,000
Line of credit borrowings during period		6,200,000
Line of credit, outstanding borrowings			1,874,000
Cash collateral		2,082,000
Cash collateral returned			251,000
Senior secured Term Loan proceeds							90,000,000
Remaining Term Loan B balance prepaid						13,427,000
Outstanding borrowing under an Industrial Revenue Bond ("IRB")									1,830,000
Repayment of long-term debt			$ 13,427,000					$ 1,830,000