Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010
Consolidated Statements of Income [Abstract]
Income tax provision on equity in earnings of affiliate	$ 563	$ 437	$ 1,587	$ 1,223

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