Line of Credit and Long-Term Debt - Additional Information (Details) (USD $)	1 Months Ended	9 Months Ended			1 Months Ended		0 Months Ended					1 Months Ended					1 Months Ended
	Nov. 01, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2014 Tranches	Nov. 01, 2012 Senior Secured Term Loan B	Apr. 18, 2007 Senior Secured Term Loan B	Apr. 03, 2013 Industrial Revenue Bond	Sep. 30, 2012 Industrial Revenue Bond	Nov. 01, 2012 Tranche A	Jun. 30, 2014 Tranche A Minimum	Jun. 30, 2014 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	Jun. 30, 2014 Tranche A-1 Minimum	Jun. 30, 2014 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.
Deferred finance costs		988,000
Payments of Financing Costs		914,000
Letters of credit		5,695,000		7,211,000
Line of credit availability		52,167,000		51,939,000
Borrowings interest rate										1.65%	3.75%				3.15%	5.25%
Line of credit, outstanding borrowings		274,000
Line of credit borrowings during period		6,200,000
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		$ 15,257,000					$ 1,830,000