Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings per Common Share (Details)

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EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Basic and Diluted Earnings Per Common Share            
Basic weighted average number of shares outstanding 37,818   37,599   37,731 37,842
Effect of dilutive securities:            
Unvested restricted stock 559   570   626 670
Diluted average shares outstanding 38,377   38,169   38,357 38,512
Net earnings as reported (in dollars) $ 167,389 $ 131,843 $ 90,678 $ 71,152 $ 299,232 $ 161,830
Basic earnings per share (in dollars per share) $ 4.43   $ 2.41   $ 7.93 $ 4.28
Diluted earnings per share (in dollars per share) $ 4.36   $ 2.38   $ 7.80 $ 4.20