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 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Basic and Diluted Earnings Per Common Share                
Basic weighted average number of shares outstanding 37,647     37,607     37,703 37,763
Effect of dilutive securities:                
Unvested restricted stock 582     798     582 728
Diluted average shares outstanding 38,229     38,405     38,285 38,491
Net earnings as reported (in dollars) $ 200,752 $ 167,389 $ 131,843 $ 109,118 $ 90,678 $ 71,152 $ 499,984 $ 270,948
Basic earnings per share (in dollars per share) $ 5.33     $ 2.90     $ 13.26 $ 7.17
Diluted earnings per share (in dollars per share) $ 5.25     $ 2.84     $ 13.06 $ 7.04