EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
EARNINGS PER SHARE
Weighted-average anti-dilutive stock options outstanding (in shares)			100,000
Basic earnings per share
Net Income (Loss)	$ 131,924	$ 188,081	$ 189,694
Income attributable to unvested stock-based compensation awards	(447)	(533)	(445)
Income available to common shareholders	$ 131,477	$ 187,548	$ 189,249
Weighted-average common shares outstanding - basic (in shares)	53,601,000	53,896,000	53,977,000
Basic earnings per share(in dollar per share)	$ 2.45	$ 3.48	$ 3.51
Diluted earnings per share
Net Income (Loss)	$ 131,924	$ 188,081	$ 189,694
Income attributable to unvested stock-based compensation awards	(447)	(533)	(445)
Income available to common shareholders	$ 131,477	$ 187,548	$ 189,249
Weighted-average common shares outstanding - basic (in shares)	53,601,000	53,896,000	53,977,000
Assumed exercise of stock options (in shares)	124,000	312,000	423,000
Weighted-average common shares outstanding - diluted (in shares)	53,725,000	54,208,000	54,400,000
Diluted earnings per share(in dollar per share)	$ 2.45	$ 3.46	$ 3.48
Stock Repurchase Program
Number of common shares authorized to be repurchased (in shares)	2,697,000	2,697,000	2,697,000	2,680,000
Number of common shares repurchased (in shares)	607,161	250,000	67,500
Average price per share repurchased	$ 49.44	$ 65.51	$ 71.91