Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income taxes
Net deferred tax assets prior to valuation allowance	$ 46,115	$ 47,897
Deferred tax liability result of insurance settlement	13,850
Consolidated
Income taxes
Net deferred tax assets prior to valuation allowance	$ 40,879	$ 42,434
Deferred tax assets valuation allowance percentage	100.00%	100.00%
Net operating loss carryforwards for federal income tax purpose, not subject to expiration	$ 161,702