Fair Value Measurements (Maturity Dates Of Investment) (Details) (USD $) In Thousands	Oct. 01, 2011
Fair Value Measurements [Abstract]
Less than 1 year, Amortized Cost	$ 147,651
1 to 5 years, Amortized Cost	106,889
6 to 10 years, Amortized Cost	1,314
Thereafter, Amortized Cost
Total Amortized Cost	255,854
Less than 1 year, Estimated Fair Value	147,115
1 to 5 years, Estimated Fair Value	106,787
6 to 10 years, Estimated Fair Value	1,299
Thereafter, Estimated Fair Value
Total Estimated Fair Value	$ 255,201

This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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