Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Income tax benefit from cumulative adjustments	$ 69,600	$ 76,500
Valuation allowance	504,392	573,995
Amount of adjustment to APIC, deferred tax liability due to change in valuation allowance.		8,800
Operating loss carryforwards	1,300,000
Operating loss carryforwards subject to expiration	1,100,000
Interest and penalties accrued related to unrecognized tax benefits	3,800	2,300
Gross unrecognized tax benefits	$ 48,963	$ 48,116		$ 39,729	$ 39,093
Forecast
Operating Loss Carryforwards [Line Items]
Gross unrecognized tax benefits			$ 37,500