Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 7

-Section 03

-Paragraph 16

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Senior Notes and Other Long Term Debt (Details Textuals) (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2011	Apr. 01, 2011	Oct. 31, 2009	Oct. 22, 2009
Senior Notes and Other Long Term Debt [Line Items]
Unamortized discount on the Notes	$ 2,456,000	$ 2,704,000	$ 3,400,000
Credit Facility maximum borrowing capacity	325,000,000
Senior Notes and Other Long Term Debt (Textuals) [Abstract]
Senior Notes due date	Sep. 15, 2016
Maturity date of the Credit Facility	2016-01-25
Principal amount of outstanding borrowings under the Credit Facility	170,000,000	60,000,000
Principal amounts of Notes issued	275,000,000	275,000,000	275,000,000	275,000,000
Interest rate at which the Notes bear interest			8.875%
Original issue discount of the Notes			1.24%
Cash repurchase price percentage of the aggregate principal amount of the Notes	101.00%
Credit Facility interest rate description	Borrowings under the Credit Facility bear interest, at the Company’s option, at either (1) the highest of the Federal Funds rate plus 0.50%, the Eurodollar rate plus 1.00% or the administrative agent’s prime rate as announced from time to time, or (2) at the Eurodollar rate plus, in the case of each of (1) and (2), an applicable margin that is based on the ratio of the Company’s debt to earnings before interest, taxes, depreciation and amortization (EBITDA).
Borrowing availability under the Credit Facility	146,200,000
Capital leases payable outstanding	2,613,000	3,074,000
Weighted average payable period on capital leases in months	36 months	36 months
Standby letters of credit outstanding amount	8,800,000
Capital leases due date, start	Fiscal year 2014
Capital leases due date, end	Fiscal year 2015
Letter of Credit [Member]
Senior Notes and Other Long Term Debt [Line Items]
Credit Facility maximum borrowing capacity	$ 35,000,000
Line of Credit [Member]
Senior Notes and Other Long Term Debt [Line Items]
Weighted average effective interest rate on the Company's outstanding borrowings	3.23%
Capital Lease Obligations [Member]
Senior Notes and Other Long Term Debt [Line Items]
Weighted average effective interest rate on the Company's outstanding borrowings	4.65%