Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2023	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 83,704	$ 83,704	$ 504,392
Pre-tax profit		1,078,988	339,447	$ (344,622)
NOL carryforwards for federal income tax purposes	607,100	607,100
Operating loss carryforwards subject to expiration	334,500	$ 334,500
NOL carryforwards offset percentage		80.00%
Decrease in valuation allowance	420,700
Interest and penalties accrued related to unrecognized tax benefits	0	$ 0	3,800
Gross unrecognized tax benefits	$ 18,064	$ 18,064	$ 48,963	$ 48,116		$ 39,729
Forecast
Operating Loss Carryforwards [Line Items]
Gross unrecognized tax benefits					$ 3,100