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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Mar. 31, 2022
Jun. 20, 2023
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 $ (1.1) $ (1.9)      
Awards Under Executive Incentive Plan Period         3 years
Preferred Stock, Par Value Per Share $ 1.00     $ 1.00  
Minimum [Member]          
Class of Stock [Line Items]          
Purchase Price Increase Per Share       18.00  
Maximum [Member]          
Class of Stock [Line Items]          
Purchase Price Increase Per Share       $ 160.38  
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 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 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 $ (1.1) $ (1.9) $ (1.9)