Income Taxes Income Taxes - Deferred tax additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Deferred Tax Liabilities, Net	$ 24,711	$ 33,733
Deferred Tax Assets, Valuation Allowance	20,118	18,079
Domestic Tax Authority
Income Taxes [Line Items]
Deferred Tax Liabilities, Net	12,200	24,500
Deferred Tax Assets, Valuation Allowance	10,400	10,700
State and Local Jurisdiction
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	10,500
Foreign Tax Authority
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 9,700	7,300
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2020
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 29,600
Deferred Tax Assets, Net	$ 7,700	$ 8,800