Income Taxes - Loss Carryforwards and Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating loss carryforwards
Net deferred tax assets	$ 61,557	$ 31,647
Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding accrued interest and penalties
Balance at beginning of year	2,966	8,929	$ 240
Additions based on tax positions related to current year			8,689
Additions based on tax positions related to prior years	7,473	2,726
Reductions for tax positions related to prior years	(240)	(8,689)
Reductions for settlements with tax authorities
Balance at end of year	10,199	2,966	8,929
Interest and penalties accrued	0	$ 600	$ 700
State
Operating loss carryforwards
Future tax benefits	2,800
Net operating loss carryforwards	47,000
Increase in valuation allowance	400
Net deferred tax assets	2,400
Maximum
Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding accrued interest and penalties
Decrease in unrecognized tax benefits	$ 10,200