Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 27, 2014	Mar. 28, 2013	Mar. 27, 2014	Mar. 28, 2013
Interest Income (Expense), Net [Abstract]
Interest on long-term debt, including amortization of deferred financing costs	$ 9,943	$ 10,833	$ 19,876	$ 21,891
Interest on lease finance obligations	10,948	11,089	21,936	22,232
Amortization of terminated interest rate swaps	161	161	322	322
Amortization of debt discount	91	98	182	613
Miscellaneous	168	(23)	367	201
Interest expense	$ 21,311	$ 22,158	$ 42,683	$ 45,259