Fair Value Of Assets And Liabilities Common Stock Subject to Repurchase Level 3 Rollforward (Details) (Level 3, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2012
Level 3
Fair Value, Temporary Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, September 28, 2012	$ 167,461
Issuances of Parent Company common stock	705
Repurchases of Parent Company common stock	(9,723)
Change in fair market value of Parent Company common stock	(1,759)
Balance, December 28, 2012	$ 156,684