Income Taxes - Valuation Allowances (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 76,206	$ 30,924
Capital loss carryforwards	40,700
Interest expense limitation carryforwards	32,900
Federal net operating loss carry forwards, have no expiration period	4,600
Increase in valuation allowance	45,300
Withdrew of permanent reinvestment assertion	123,900
Deferred tax liability related to withholding and state income taxes	2,900
Deferred Tax Liabilities, Undistributed Foreign Earnings	4,740	3,529
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	16,000
Operating Loss Carryforwards	54,400
Tax Credit Carryforward, Amount	3,800
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	60,200
Operating Loss Carryforwards	206,800
Income Tax Holiday, Aggregate Dollar Amount	$ 4,000	$ 17,800
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.12	$ 0.47
Undistributed Earnings of Foreign Subsidiaries	$ 26,500
Deferred Tax Liabilities, Undistributed Foreign Earnings	26,500
State Taxing Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	146,200
Tax Credit Carryforward, Amount	$ 1,800