Income Taxes - Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Provision for income taxes	$ 86	$ 3,537	$ 27,046	$ 13,743
Valuation allowance	26,700		26,700
Income tax expense (benefit)	100		300
Unrecognized tax benefits	$ 0		$ 0		$ 0