Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Entity Information [Line Items]
Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent			22.50%
Effective Income Tax Rate Reconciliation, Including Discontinued Operations, Percent	(10.40%)	55.20%	(1.80%)	71.10%
Unrecognized Tax Benefits	$ 1.4		$ 1.4
Unrecognized Tax Benefits Due to Uncertainty In Timing of Deductibility	1.4		1.4
Unrecognized tax benefits anticipated to result in a decrease in effective tax rate in the period the position is released	$ 0.5		$ 0.5
Subsidiaries [Member]
Entity Information [Line Items]
Effective income tax rates		16.40%		4.80%
Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent			22.50%
Effective Income Tax Rate Reconciliation, Including Discontinued Operations, Percent	16.80%		13.70%
Unrecognized Tax Benefits	$ 1.4		$ 1.4
Unrecognized Tax Benefits Due to Uncertainty In Timing of Deductibility	1.4		1.4
Unrecognized tax benefits anticipated to result in a decrease in effective tax rate in the period the position is released	$ 0.5		$ 0.5