SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,489,026	$ 1,411,863
Other comprehensive income/(loss) before reclassifications	13,603	40,821
Amounts reclassified from AOCI	(3,264)	(4,794)
Other comprehensive income net of tax	10,339	36,027
Ending balance	1,525,646	1,480,343
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(12,147)	(40,145)
Other comprehensive income net of tax	10,339	36,027
Ending balance	(1,808)	(4,118)
AOCI, Securities | Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(37,575)	(68,447)
Other comprehensive income/(loss) before reclassifications	17,194	31,565
Amounts reclassified from AOCI	(3)	(4)
Other comprehensive income net of tax	17,191	31,561
Ending balance	(20,384)	(36,886)
AOCI, Securities | Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(9,226)	(8,724)
Other comprehensive income/(loss) before reclassifications	0	0
Amounts reclassified from AOCI	(239)	(500)
Other comprehensive income net of tax	(239)	(500)
Ending balance	(9,465)	(9,224)
AOCI, Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	34,654	37,026
Other comprehensive income/(loss) before reclassifications	(3,591)	9,256
Amounts reclassified from AOCI	(3,022)	(4,290)
Other comprehensive income net of tax	(6,613)	4,966
Ending balance	$ 28,041	$ 41,992