Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Loss Carryforwards [Line Items]
Benefit from income taxes	$ 673	$ 6,101	$ 4,960	$ 6,713
Deferred tax assets previously offset by valuation allowance	4,400		4,400
Benefit recognized from valuation offset	500
Deferred tax assets		$ 5,900		$ 5,900
Operating loss carryforwards	353,000		353,000
Operating loss carryforwards, usable			211,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expected expiration amount	180,000		180,000
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expected expiration amount	$ 31,000		$ 31,000