Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
TCJA, provisional expense for transition tax		$ 86,858		$ 86,707
TCJA, provisional expense for state transition tax			$ 597	1,423
Foreign earnings repatriated		152,992
TCJA, expense for undistributed accumulated foreign earnings			5,245	$ 6,932
TCJA, benefit for undistributed accumulated foreign earnings	$ 300		1,185
Unremitted foreign earnings	1,605,522		3,501
Deferred tax liabilities recognized on foreign earnings			185
TCJA, provisional expense for transition tax, liability, current	6,949
Long-term tax liability	59,063	$ 66,012
TCJA, provisional expense for transition tax, liability, year 5	6,949
TCJA, provisional expense for transition tax, liability, year 6	13,029
TCJA, provisional expense for transition tax, liability, year 7	17,371
TCJA, provisional expense for transition tax, liability year 8	21,714
International
Income Tax Contingency [Line Items]
Foreign earnings repatriated			62,383
U.S. Federal
Income Tax Contingency [Line Items]
Foreign earnings repatriated	$ 85,000		$ 228,750