Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating Loss Carryforwards [Line Items]
Provision (benefit) of income taxes	$ 1,149	$ 547	$ (3,811)	$ (6,166)
Deferred tax assets recognized (reduced) by valuation allowance	(200)		4,200
Deferred tax assets		$ 5,900		$ 5,900
Operating loss carryforwards	351,000		351,000
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