EARNINGS PER SHARE - Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net income	$ 23,131	$ 30,280	$ 39,968	$ 36,155	$ 39,113	$ 41,781	$ 93,380	$ 117,050
Denominator:
Weighted average shares of common stock outstanding (in shares)	10,892			10,964			10,881	11,290
Effect of dilutive common stock equivalents (in shares)	41			78			44	79
Weighted average shares of common stock outstanding (in shares)	10,933			11,042			10,925	11,369
Earnings per share - basic (in usd per share)	$ 2.12			$ 3.30			$ 8.58	$ 10.37
Earnings per share - diluted (in usd per share)	$ 2.12			$ 3.27			$ 8.55	$ 10.30