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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2021 and 2020:
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Numerator (in thousands):
Net income (Numerator for basic and dilutive earnings per share)$118,134 $55,624 $217,792 $98,463 
Denominator:
       Basic weighted average shares outstanding24,844,644 25,074,826 24,897,462 25,198,952 
       Effect of dilutive securities:
         Stock-based compensation units217,168 78,250 241,229 167,154 
       Diluted weighted average shares outstanding25,061,812 25,153,076 25,138,691 25,366,106 
Basic earnings per share$4.75 $2.22 $8.75 $3.91 
Diluted earnings per share$4.71 $2.21 $8.66 $3.88 
Antidilutive non-vested restricted stock units excluded from calculation of diluted earnings per share835 2,267 8,043 9,808