Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
TCJA, provisional income tax expense (benefit)	$ 3,399	$ 4,152
TCJA, provisional expense for transition tax	86,858	86,707
TCJA, provisional expense for state transition tax	597	1,423
Unremitted foreign earnings		1,397,056	$ 10,166
TCJA, expense for undistributed accumulated foreign earnings	5,245	6,932
TCJA, benefit for undistributed accumulated foreign earnings	1,185
Deferred tax liabilities recognized on foreign earnings			$ 502
Foreign earnings repatriated		7,250
TCJA, provisional expense for transition tax, liability, current	416
Long-term tax liability	72,961	$ 79,770
TCJA, provisional expense for transition tax, liability, year 2,3,4,5	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 [Member]
Income Tax Contingency [Line Items]
Foreign earnings repatriated	62,383
U.S. Federal
Income Tax Contingency [Line Items]
Foreign earnings repatriated	$ 228,750