Fair Value (Fair Value Reconciliation of Unobservable Inputs) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Sep. 30, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure		$ 2,288
Business Acquisition, Contingent Consideration, at Fair Value	59,400
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	805
Available-for-sale Securities, Fair Value Disclosure	3,093	2,288
Business Acquisition, Contingent Consideration, at Fair Value	59,400
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Acquisition, Contingent Consideration, at Fair Value	59,400	59,400
Available-for-sale Securities, Fair Value Disclosure	3,093
Business Acquisition, Contingent Consideration, at Fair Value	59,400	59,400
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	$ 0