Segment and Geographic Data, Revenue and assets by geographic area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 616,170	$ 602,890	$ 597,665	$ 554,254	$ 530,570	$ 572,781	$ 588,199	$ 538,547	$ 2,370,979	$ 2,230,097	$ 2,594,029
Property and equipment, net	926,619				914,552				926,619	914,552
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									591,082	568,849	363,847
Property and equipment, net	123,812				133,812				123,812	133,812
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									800,733	775,204	801,539
Property and equipment, net	130,854				121,957				130,854	121,957
Czech Republic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	47,002				51,620				47,002	51,620
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									89,348	61,236	175,639
Property and equipment, net	107,381				98,534				107,381	98,534
Israel [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									13,319	14,708	219,037
Property and equipment, net	138,741				140,994				138,741	140,994
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									876,497	810,100	1,033,967
People's Republic of China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	172,274				169,395				172,274	169,395
Republic of China (Taiwan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	120,368				116,315				120,368	116,315
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	84,388				80,304				84,388	80,304
Other Geographic Area [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 1,799				$ 1,621				$ 1,799	$ 1,621