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Stockholders' Equity and Restrictions Change in Common Shares (Details) - shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Mar. 04, 2004
Class of Stock [Line Items]        
Common stock, shares authorized (in shares)       127,000,000
Treasury Stock [Member]        
Class of Stock [Line Items]        
Common Stock, Shares, Issued 4,937,000 4,138,000 3,136,000  
Common Stock Class A [Member]        
Class of Stock [Line Items]        
Common Stock, Shares, Issued 53,758,176 53,170,413 52,654,000  
Common stock, shares authorized (in shares) 100,000,000 100,000,000   100,000,000
Stock Issued During Period, Shares, New Issues 22,000      
Deferred Compensation Arrangement with Individual, Shares Issued 91,000 112,000    
Stock Repurchased During Period, Shares 0 0    
Treasury Stock, Shares, Acquired 799,000      
Common Stock Class A [Member] | Stock Investment Plan        
Class of Stock [Line Items]        
Stock Issued During Period, Shares, New Issues 475,000 404,000    
Common Stock Class B [Member]        
Class of Stock [Line Items]        
Common Stock, Shares, Issued 1,001,714 1,001,714 1,002,000  
Common stock, shares authorized (in shares) 2,000,000 2,000,000   2,000,000
Stock Issued During Period, Shares, New Issues 0      
Deferred Compensation Arrangement with Individual, Shares Issued 0 0    
Stock Repurchased During Period, Shares 0 0    
Treasury Stock, Shares, Acquired   1,002,000    
Common Stock Class B [Member] | Stock Investment Plan        
Class of Stock [Line Items]        
Stock Issued During Period, Shares, New Issues 0 0    
Preferred Stock        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares)       25,000,000
Treasury Stock [Member]        
Class of Stock [Line Items]        
Stock Issued During Period, Shares, New Issues 0      
Deferred Compensation Arrangement with Individual, Shares Issued 0 0    
Treasury Stock [Member] | Stock Investment Plan        
Class of Stock [Line Items]        
Stock Issued During Period, Shares, New Issues 0 0