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Stockholders' Equity (Summary of Regular Quarterly Dividend) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Cash dividend (in usd per share) $ 0.90 $ 0.90 $ 0.90 $ 0.90 $ 0.75 $ 3.45
Payment of dividends $ 22,870       $ 18,939  
Common Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payment of dividends $ 22,870 $ 22,746 $ 22,747 $ 22,739 $ 18,939 $ 87,171