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Shareholders' Equity Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2023
Shares repurchased under equity repurchase program 377      
Depository Shares, Issued     400  
Preferred Stock, Dividend Rate, Percentage     5.625%  
Preferred Stock, Liquidation Preference, Value     $ 100  
Preferred Stock, Liquidation Preference Per Share     $ 1,000  
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants     $ 400,000  
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants     $ 394,000  
Stock Option        
Common stock shares reserved for future issuance       4,300
Common Stock        
Shares repurchased under equity repurchase program 400 9,500    
Equity Repurchase Program | Common Stock        
Shares repurchased under equity repurchase program   9,500    
Average cost per share of shares repurchased under equity repurchase program $ 92.61 $ 75.82