Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Transition tax expense (benefit), tax cuts and jobs act of 2017	$ 24,500
Undistributed earnings of foreign subsidiaries	740,500
Valuation allowance, deferred tax asset, increase (decrease), amount	$ 1,300	$ 2,000
Effective tax rate from ongoing operations	0.20%	25.90%	0.80%
Income tax provision	$ (220)	$ (32,501)	$ (777)
Foreign income tax holiday, term	15 years
Foreign	$ 12,861	15,212	8,266
Unrecognized tax benefits	1,000		1,100
Reserve for potential uncertain income tax return positions	9,199	9,294	$ 9,144	$ 3,265
Portion of an unrecognized tax benefit netted against deferred tax asset for net operating loss carry forwards	$ 0	0
India
Operating Loss Carryforwards [Line Items]
Foreign income tax holiday, term	5 years
India | Minimum Alternative Tax (“MAT”)
Operating Loss Carryforwards [Line Items]
Foreign income tax holiday, term	10 years
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	$ 46,851	$ 42,755
Maximum | United States
Operating Loss Carryforwards [Line Items]
Income tax rate, tax cuts and jobs act of 2017 percent	21.00%