Financial Instruments And Derivatives (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
Apr. 01, 2012	Apr. 03, 2011	Dec. 31, 2011
Financial Instruments And Derivatives [Abstract]
Net gain (loss) from sales of marketable securities	$ 300,000	$ (200,000)
Fair market value of investments with unrealized losses	61,704,000		64,571,000
Fair market value of investments with unrealized losses greater than one year	1,100,000		2,400,000
Fair market value of investments with unrealized losses less than one year	60,600,000		62,200,000
Notional amount of foreign exchange contracts hedging monetary assets and liabilities	$ 71,400,000		$ 85,400,000

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References+ Details