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Earnings Per Share (EPS Computations) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Less: Earnings allocated to unvested restricted stock $ 8,286 $ 10,899 $ 17,130 $ 27,301
Income attributable to common stockholders (79) (6) (150) (20)
Income attributable to common stockholders $ 8,207 $ 10,893 $ 16,980 $ 27,281
Denominator [Abstract]        
Denominator for basic earnings per common share - weighted average shares outstanding 14,793,000 14,798,000 14,776,000 15,020,000
Weighted average number of common and common equivalent shares outstanding for diluted EPS computation 15,454,000 15,712,000 15,461,000 16,033,000
Basic and Diluted earnings per common share:        
Continuing operations (in dollars per Share) $ 0.55 $ 0.74 $ 1.14 $ 1.82
Continuing operations (in dollars per Share) $ 0.53 $ 0.69 $ 1.10 $ 1.70
Antidilutive securities excluded from computation of diluted EPS 1,236,490,000 366,038,000 1,183,146 259,359
Stock options        
Denominator [Abstract]        
Effect of dilutive securities, share options (in shares) 50,000 226,000 74,000 325,000
Performance awards        
Denominator [Abstract]        
Effect of dilutive securities, share options (in shares) 611,000 688,000 611,000 688,000