Segment Reporting and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales and long-lived assets attributed to countries based upon the location of customers
Sales from U.S. operations to external domestic and foreign customers									$ 1,064,779	$ 1,306,192	$ 1,079,700
Sales based upon location of customers	303,759	290,601	325,088	353,630	334,421	392,794	424,710	374,805	1,273,078	1,526,730	1,302,314
Long-lived assets	390,164				382,429				390,164	382,429	375,653
United States [Member]
Sales and long-lived assets attributed to countries based upon the location of customers
Sales based upon location of customers									881,968	1,143,720	933,264
Long-lived assets	354,122				349,988				354,122	349,988	363,738
All other [Member]
Sales and long-lived assets attributed to countries based upon the location of customers
Sales based upon location of customers									391,110	383,010	369,050
Long-lived assets	$ 36,042				$ 32,441				$ 36,042	$ 32,441	$ 11,915