Debt Additional Details (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended										9 Months Ended	12 Months Ended			12 Months Ended			12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Secured Debt [Member]	Sep. 30, 2010 Secured Debt [Member]	Nov. 02, 2011 Secured Debt [Member]	Sep. 30, 2011 Secured Debt [Member]	Jun. 16, 2010 Secured Debt [Member]	Sep. 30, 2012 Senior Notes [Member]	Sep. 30, 2011 Senior Notes [Member]	Jul. 01, 2012 Revolving Credit Facility [Member]	Sep. 30, 2012 Notes 12% PIK [Member]	Sep. 30, 2012 Notes 6.75% [Member]	Mar. 15, 2012 Notes 6.75% [Member]	Sep. 30, 2012 Senior Notes [Member]	Sep. 30, 2011 Senior Notes [Member]	Feb. 01, 2011 Senior Notes [Member]	Sep. 30, 2012 Revolving Credit Facility [Member]	Sep. 30, 2011 Revolving Credit Facility [Member]	Sep. 30, 2010 Revolving Credit Facility [Member]	Sep. 30, 2011 Refinancing of Debt [Member] Senior Notes [Member]	Sep. 30, 2012 Tendered After Tender Offer Consent Period Prior to Expiration of Tender Offer [Member] [Member] Notes 12% PIK [Member]	Sep. 30, 2012 Not Tendered During Offer Period [Member] [Member] Notes 12% PIK [Member]	Sep. 30, 2012 Tendered During Tender Offer Consent Period [Member] Notes 12% PIK [Member]
Debt Instrument [Line Items]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 3,097
Capital Leases, Future Minimum Payments Due in Two Years	3,153
Capital Leases, Future Minimum Payments Due in Three Years	2,513
Capital Leases, Future Minimum Payments Due in Four Years	1,866
Capital Leases, Future Minimum Payments Due in Five Years	1,500
Capital Leases, Future Minimum Payments Due Thereafter	14,554
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	16,414
Long-term Debt, Maturities, Repayments of Principal in Year Two	13,164
Long-term Debt, Maturities, Repayments of Principal in Year Three	8,063
Long-term Debt, Maturities, Repayments of Principal in Year Four	361,222
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,500
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,264,554
Secured Debt				950,000			750,000
Additional Borrowings, Par Value				200,000									300,000
Repayments of Unsecured Debt																						88	13,522	231,421
Percent Premium Over Par						108.50%								100.00%
Percent Discount Under Par								1.37%
Debt Issuance Costs	(11,231)	(12,616)	(55,024)	3,581	20,823								6,265		792	10,545		525	2,071	9,839
Debt Related Commitment Fees and Debt Issuance Costs															531	4,954		482
Repayments of Senior Debt	(155,061)	(224,763)	(1,278,760)												150,000	220,000
Payments of Debt Extinguishment Costs												23,777				700							1,623
Write off of debt issuance costs	2,946	15,420	6,551									2,097			2,824	7,521		382			24,370
Debt Coventant, Limit on Additional Borrowings															250,000	100,000
Senior Notes									370,175	525,237							680,000
Percentage of Holders Needed to Accelerate Bonds				25.00%									25.00%
Debt Instrument, Unamortized Discount								10,245
ABL Interest Percentage Above Base Rate											0.75%
ABL Interest Percentage Above LIBOR											1.75%
Line of Credit Facility, Current Borrowing Capacity																		198,209	176,612
Line of Credit Lender Restrictions																		7,942	48,769
Letters of Credit Outstanding, Amount																		25,302	32,962
Gross Debt Obligations	$ 1,664,917	$ 1,564,512