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Earnings Per Share (EPS Computations) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Less: Earnings allocated to unvested restricted stock $ 16,402 $ 12,933
Income attributable to common stockholders (15) (27)
Income attributable to common stockholders $ 16,387 $ 12,906
Denominator [Abstract]    
Denominator for basic earnings per common share - weighted average shares outstanding 15,244 17,965
Weighted average number of common and common equivalent shares outstanding for diluted EPS computation 16,369 18,199
Basic and Diluted earnings per common share:    
Continuing operations (in dollars per Share) $ 1.07 $ 0.72
Continuing operations (in dollars per Share) $ 1.00 $ 0.71
Stock options    
Denominator [Abstract]    
Effect of dilutive securities, share options (in shares) 409 234
Performance awards    
Denominator [Abstract]    
Effect of dilutive securities, share options (in shares) 716 0