Operating Segments and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Dec. 31, 2010	Oct. 03, 2010	Jul. 04, 2010	Apr. 04, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Segment Information
Revenues	$ 464,361	$ 519,713	$ 536,251	$ 461,628	$ 425,176	$ 396,927	$ 410,563	$ 384,424	$ 1,981,953	$ 1,617,090	$ 1,362,016
Depreciation and amortization									50,174	55,279	55,857
Asset impairment	(2,500)				(16,600)				(2,549)	(16,574)	(27,751)
Operating income	34,858	51,863	58,212	42,073	16,698	41,586	39,610	31,295	187,006	129,189	36,370
Total assets	1,788,120				1,696,484				1,788,120	1,696,484	1,620,578
Acquisition of property, plant and equipment									40,053	28,194	40,377
Operating Segments [Member]
Operating Segment Information
Revenues									1,981,953	1,617,090	1,362,016
Affiliate revenues									160,909	125,446	98,745
Total revenues									2,142,862	1,742,536	1,460,761
Depreciation and amortization									(50,174)	(48,792)	(48,819)
Asset impairment									(2,549)	(16,574)	(27,751)
Total assets	1,459,651				1,328,705				1,459,651	1,328,705	1,236,200
Acquisition of property, plant and equipment									29,570	24,363	31,756
Reportable Segment [Member]
Operating Segment Information
Operating income									254,260	175,279	67,914
Americas [Member]
Operating Segment Information
Revenues									1,216,817	935,819	766,569
Affiliate revenues									42,440	48,899	43,489
Total revenues									1,259,257	984,718	810,058
Depreciation and amortization									(25,479)	(23,136)	(21,534)
Asset impairment									(1,453)	(6,921)	(3,691)
Operating income									144,820	98,633	72,907
Total assets	678,589				620,284				678,589	620,284	516,372
Acquisition of property, plant and equipment									17,195	13,421	14,501
EMEA [Member]
Operating Segment Information
Revenues									415,342	365,796	345,197
Affiliate revenues									117,291	76,485	55,256
Total revenues									532,633	442,281	400,453
Depreciation and amortization									(15,320)	(16,005)	(17,736)
Asset impairment									(841)	(8,141)	(23,020)
Operating income									84,097	47,091	(22,885)
Total assets	480,219				422,990				480,219	422,990	461,503
Acquisition of property, plant and equipment									9,504	8,482	9,364
Asia Pacific [Member]
Operating Segment Information
Revenues									349,794	315,475	250,250
Affiliate revenues									1,178	62
Total revenues									350,972	315,537	250,250
Depreciation and amortization									(9,375)	(9,651)	(9,549)
Asset impairment									(255)	(1,512)	(1,040)
Operating income									25,343	29,555	17,892
Total assets	300,843				285,431				300,843	285,431	258,325
Acquisition of property, plant and equipment									$ 2,871	$ 2,460	$ 7,891