Income Taxes (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 31, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Taxes [Abstract]
Statutory tax rate				37.50%
Deferred tax asset, net		$ 128,700		$ 128,700		$ 162,500
Effective tax rate				32.00%	21.40%
Estimated annual effective tax rate				32.80%
Unrecognized tax benefits		780		$ 780		$ 728
Surtax percent included in maximum tax rate	10.00%
Income tax expense		$ 19,624	$ 6,308	$ 53,122	$ 13,853