Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2013 Rate	Jun. 30, 2012 Rate	Jun. 29, 2013 Rate	Jun. 30, 2012 Rate
Income Tax Expense (Benefit) [Abstract]
Income tax expense	$ (260)	$ 1,928	$ 2,766	$ 6,131
Effective tax rates	(1.10%)	7.60%	4.60%	9.10%
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	2,191	0	2,191	0
Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)			$ 2,031