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Stockholders' Equity and Restrictions - Changes in Stock (Details) - shares
shares in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Common Stock Class A [Member]    
Class of Stock [Line Items]    
Common Stock, Balance at beginning of year 54,235 53,883
Stock issued for compensation 331 163
Common Stock, Balance at end of period 54,566 54,046
Treasury Stock    
Class of Stock [Line Items]    
Common Stock, Balance at beginning of year 5,330 5,330
Stock issued for compensation 0 0
Common Stock, Balance at end of period 5,330 5,330