SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,271,958	$ 1,213,700	$ 997,935
Other comprehensive income/(loss) before reclassifications	26,888	(53,936)	20,716
Amounts reclassified from AOCI	(16,190)	(760)	(2,940)
Other comprehensive income/(loss) net of tax	10,698	(54,696)	17,776
Ending balance	1,411,863	1,271,958	1,213,700
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(50,843)	3,853	(13,923)
Other comprehensive income/(loss) net of tax	10,698	(54,696)	17,776
Ending balance	(40,145)	(50,843)	3,853
AOCI, Securities | Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(115,561)	(6,932)	(13,937)
Other comprehensive income/(loss) before reclassifications	47,114	(108,624)	9,114
Amounts reclassified from AOCI	0	(5)	(2,109)
Other comprehensive income/(loss) net of tax	47,114	(108,629)	7,005
Ending balance	(68,447)	(115,561)	(6,932)
AOCI, Securities | Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	16,357	16,153	22,829
Other comprehensive income/(loss) before reclassifications	(25,199)	0	0
Amounts reclassified from AOCI	118	204	(6,676)
Other comprehensive income/(loss) net of tax	(25,081)	204	(6,676)
Ending balance	(8,724)	16,357	16,153
AOCI, Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	48,361	(5,368)	(22,815)
Other comprehensive income/(loss) before reclassifications	4,973	54,688	11,602
Amounts reclassified from AOCI	(16,308)	(959)	5,845
Other comprehensive income/(loss) net of tax	(11,335)	53,729	17,447
Ending balance	$ 37,026	$ 48,361	$ (5,368)