Comprehensive Income/(Loss) (Details) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010	Dec. 31, 2010
Comprehensive Income/(loss)
Net income/(loss)	$ (20,106)	$ (23,452)	$ (2,135)	$ 2,295
Change in cumulative translation adjustment	2,390	(4,512)	7,369	(11,990)
Change in fair value of cash flow hedges, net of taxes	(2,599)	2,412	(4,744)	6,466
Change in other adjustments, net of taxes	13	6	(42)	(46)
Comprehensive income/(loss)	(20,302)	(25,546)	448	(3,275)
Components of accumulated other comprehensive income
Cumulative translation adjustment	15,392	1,663	15,392	1,663	8,023
Fair value of cash flow hedges, net of taxes of $(333) at July 1, 2011, $(84) at December 31, 2010 and $388 at July 2, 2010	(6,335)	7,370	(6,335)	7,370	(1,591)
Other adjustments, net of taxes of $61 at July 1, 2011, $96 at December 31, 2010 and $105 at July 2, 2010	197	445	197	445	239
Total	9,254	9,478	9,254	9,478	6,671
Comprehensive Income/(Loss) (Textuals) [Abstract]
Fair value cash flow hedges, tax effect	(333)	388	(333)	388	(84)
Other adjustments, tax effect	$ 61	$ 105	$ 61	$ 105	$ 96

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