Stockholders' Equity (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Class of Stock [Line Items]
Exchange of preferred stock for common stock and common stock warrant		$ 10.6
Reclassification of stock-based compensation liability to equity		(1.9)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (1.9)
Awards Under Executive Incentive Plan Period			3 years
Common Class A [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues	722,568
Stock Issued During Period, Value, Gross	$ 24.4
Stock Issued During Period, Value, Net	23.4
Direct Costs of Stock Issuance	0.2
Preferred Stock [Member]
Class of Stock [Line Items]
Reclassification of stock-based compensation liability to equity		0.0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0.0	0.0
Common Stock [Member] \| Common Class A [Member]
Class of Stock [Line Items]
Reclassification of stock-based compensation liability to equity		0.0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0.0	0.0
Excess of Capital over Par Value [Member]
Class of Stock [Line Items]
Reclassification of stock-based compensation liability to equity		10.6
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (1.9)	$ (1.9)