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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, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic and Diluted Earnings Per Common Share
Basic weighted average number of shares outstanding	36,765		36,647		36,715	36,820
Effect of dilutive securities:
Unvested restricted stock	426		315		434	419
Diluted average shares outstanding	37,191		36,962		37,149	37,239
Net earnings as reported (in dollars)	$ 186,836	$ 131,301	$ 250,084	$ 217,254	$ 318,137	$ 467,338
Basic earnings per share (in dollars per share)	$ 5.08		$ 6.82		$ 8.67	$ 12.69
Diluted earnings per share (in dollars per share)	$ 5.02		$ 6.77		$ 8.56	$ 12.55

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