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Earnings Per Share (EPS Computations) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Less: Earnings allocated to unvested restricted stock $ 13,046 $ 5,525 $ 19,812 $ 7,725
Income attributable to common stockholders (18) (14) (33) (23)
Income attributable to common stockholders $ 13,028 $ 5,511 $ 19,779 $ 7,702
Denominator [Abstract]        
Denominator for basic earnings per common share - weighted average shares outstanding 17,499,000 17,895,000 17,809,000 17,853,000
Weighted average number of common and common equivalent shares outstanding for diluted EPS computation 18,246,000 17,932,000 18,365,000 17,893,000
Basic and Diluted earnings per common share:        
Continuing operations (in dollars per Share) $ 0.74 $ 0.31 $ 1.11 $ 0.43
Continuing operations (in dollars per Share) $ 0.71 $ 0.31 $ 1.08 $ 0.43
Effect of dilutive securities, Convertible junior subordinated debentures (in shares) 0 3,000 0 1,000
Stock options        
Denominator [Abstract]        
Effect of dilutive securities, share options (in shares) 235,000 34,000 277,000 39,000
Basic and Diluted earnings per common share:        
Antidilutive securities excluded from computation of diluted EPS   765,722   848,513
Performance awards        
Denominator [Abstract]        
Effect of dilutive securities, share options (in shares) 512,000 0 279,000 0