NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net income	$ 51,516	$ 53,455	$ 141,033	$ 144,927
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders	(243)	(289)	(709)	(849)
Adjusted net income	$ 51,273	$ 53,166	$ 140,324	$ 144,078
Denominator:
Weighted average common shares outstanding – Basic	47,570,099	47,396,495	47,555,734	47,386,426
Effect of dilutive shares:
Common stock equivalents arising from ESPP	499	729	1,764	1,814
Restricted stock awards and units and performance units	61,833	69,710	52,194	67,653
Weighted average common shares outstanding – Diluted	47,632,431	47,466,934	47,609,692	47,455,893
Basic	$ 1.08	$ 1.12	$ 2.95	$ 3.04
Diluted	$ 1.08	$ 1.12	$ 2.95	$ 3.04