NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income	$ 203,011	$ 210,061	$ 184,213
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders	(993)	(1,215)	(1,137)
Adjusted net income	$ 202,018	$ 208,846	$ 183,076
Denominator:
Weighted average common shares outstanding – Basic	47,559,669	47,390,352	47,296,447
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP	2,173	2,340	1,010
Restricted stock awards and units and performance units	60,921	75,815	67,978
Weighted average common shares outstanding – Diluted	47,622,763	47,468,507	47,365,435
Basic	$ 4.25	$ 4.41	$ 3.87
Diluted	$ 4.24	$ 4.4	$ 3.87