Long-Term Debt (Details 3) (Interest rate swaps, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 29, 2012
Mitigating interest rate exposure of variable-rate borrowings
Notional amount	$ 233,000
Interest rate swap, Maturity 2013
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	20,000
Fixed rate received (as a percent)	3.87%
Interest rate swap, Maturity 2013, B
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	83,000
Fixed rate received (as a percent)	1.20%
Interest rate swap, Maturity 2016
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	20,000
Fixed rate received (as a percent)	2.54%
Interest rate swap, Maturity 2016 B
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	30,000
Fixed rate received (as a percent)	2.54%
Interest rate swap, Maturity 2016 C
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	50,000
Fixed rate received (as a percent)	2.54%
Interest rate swap, Maturity 2016 D
Mitigating interest rate exposure of variable-rate borrowings
Hedged transaction	30-day Libor
Notional amount	$ 30,000
Fixed rate received (as a percent)	2.54%