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Stockholders' Equity (Activity of Common Shares Held in Treasury) (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares        
Beginning of period (in shares)   8,498,163 8,486,278 8,591,310
Common shares used upon lapse of restricted stock units and options ( in shares)   (301,710) (163,115) (105,032)
Common shares repurchased as part of the stock repurchase program (in shares) 2,052,429 2,052,429 175,000 0
End of period (in shares) 10,248,882 10,248,882 8,498,163 8,486,278
Dollar Amount        
Beginning of period (in dollars)   $ 102,949 $ 102,339 $ 103,633
Common shares used upon lapse of restricted stock units and options   (2,249) (1,616) (1,294)
Common shares repurchased as part of the stock repurchase program $ 49,900 49,872 2,226 0
End of period (in dollars) $ 150,572 $ 150,572 $ 102,949 $ 102,339