Segment and Geographic Data, Revenue and assets by geographic area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 2,501,898	$ 2,668,305	$ 3,034,689
Property and equipment, net	943,165	951,525
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	592,460	686,985	743,647
Property and equipment, net	95,570	100,163
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	772,194	910,509	982,082
Property and equipment, net	199,076	179,218
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	103,475	113,473	123,846
Property and equipment, net	118,604	116,883
Israel [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	16,609	17,787	13,299
Property and equipment, net	79,267	92,636
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	1,017,160	939,551	$ 1,171,815
People's Republic of China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	201,848	215,139
Republic of China (Taiwan) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	167,177	161,374
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	77,024	81,338
Other Geographic Area [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 4,599	$ 4,774