SELECTED QUARTERLY DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Selected Quarterly Financial Information [Abstract]
Interest income	$ 90,942	$ 88,623	$ 84,482	$ 79,220	$ 75,353	$ 62,558	$ 53,622	$ 48,034	$ 343,267	$ 239,567	$ 193,219
Interest expense	42,343	40,230	35,958	27,701	18,516	10,066	4,944	3,154	146,232	36,680	15,131
NET INTEREST INCOME	48,599	48,393	48,524	51,519	56,837	52,492	48,678	44,880	197,035	202,887	178,088
Provision for credit losses	300	400	800	4,350	8,958	0	0	417	5,850	9,375	1,077
CREDIT LOSSES	48,299	47,993	47,724	47,169	47,879	52,492	48,678	44,463	191,185	193,512	177,011
Noninterest income	17,208	10,835	11,501	10,314	10,519	10,164	10,492	10,687
Noninterest expense	29,445	29,097	42,734	29,434	27,434	27,894	27,913	26,969	130,710	110,210	104,287
Income tax expense	6,436	4,479	1,880	3,771	4,987	6,237	5,584	4,539	16,566	21,347	21,711
NET INCOME	$ 29,626	$ 25,252	$ 14,611	$ 24,278	$ 25,977	$ 28,525	$ 25,673	$ 23,642	$ 93,767	$ 103,817	$ 95,733
Basic earnings per common share (in USD per share)	$ 1.16	$ 0.99	$ 0.57	$ 0.95	$ 1.02	$ 1.12	$ 1.00	$ 0.93	$ 3.67	$ 4.07	$ 3.76
Diluted earnings per common share (in USD per share)	$ 1.16	$ 0.98	$ 0.57	$ 0.94	$ 1.01	$ 1.11	$ 1.00	$ 0.92	$ 3.65	$ 4.04	$ 3.74