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Condensed Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 01, 2012
Apr. 03, 2011
Condensed Consolidated Statement of Comprehensive Income [Abstract]    
Net Income $ 26,202 $ 24,137
Unrealized gain (loss) on available-for-sale securities, net of deferred tax 145 (645)
Total comprehensive income $ 26,347 $ 23,492