Subsequent Events (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	4 Months Ended	12 Months Ended			4 Months Ended									4 Months Ended
	Sep. 30, 2012	Jan. 22, 2012	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010	Jan. 20, 2013 Refinancing of Debt [Member]	Jan. 20, 2013 Repurchase of Equity [Member]	Sep. 30, 2012 Revolving Credit [Member]	Nov. 05, 2012 Revolving Credit [Member] Refinancing of Debt [Member]	Sep. 30, 2012 Term Loan [Member]	Oct. 02, 2011 Term Loan [Member]	Nov. 05, 2012 Term Loan [Member] Refinancing of Debt [Member]	Nov. 05, 2012 Minimum [Member] Revolving Credit [Member] Refinancing of Debt [Member]	Nov. 05, 2012 Maximum [Member] Revolving Credit [Member] Refinancing of Debt [Member]	Jan. 20, 2013 Stock Repurchase Authorization Program Expiring November 2014 [Member] Repurchase of Equity [Member]
Subsequent Event [Line Items]
Revolving credit facility, maximum borrowing								$ 400,000,000	$ 400,000,000
Term loan outstanding										165,000,000	185,000,000	200,000,000
Variable interest rate									2.00%	2.50%			1.75%	2.25%
Expected write off of deferred debt issuance cost						800,000
Common stock acquired (in shares)	0.9			0.3			1.0
Aggregate remaining amount authorized for repurchase	23,112,000	6,400,000	30,013,000	193,099,000	97,000,000		26,900,000
Repurchase of common stock, authorized amount															$ 100,000,000