SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,480,343	$ 1,411,863	$ 1,292,385	$ 1,271,958	$ 1,411,863	$ 1,271,958
Other comprehensive (loss)/income before reclassifications	(180)		29,790		40,641	24,863
Amounts reclassified from AOCI	(4,843)		(4,279)		(9,637)	(8,371)
Other comprehensive (loss)/income net of tax	(5,023)	36,027	25,511	(9,019)	31,004	16,492
Ending balance	1,500,979	1,480,343	1,346,555	1,292,385	1,500,979	1,346,555
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4,118)	(40,145)	(59,862)	(50,843)	(40,145)	(50,843)
Other comprehensive (loss)/income net of tax	(5,023)	36,027	25,511	(9,019)	31,004	16,492
Ending balance	(9,141)	(4,118)	(34,351)	(59,862)	(9,141)	(34,351)
AOCI, Securities | Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(36,886)	(68,447)	(115,041)	(115,561)	(68,447)	(115,561)
Other comprehensive (loss)/income before reclassifications	(3,342)		18,438		28,223	18,963
Amounts reclassified from AOCI	(834)		(4)		(838)	(9)
Other comprehensive (loss)/income net of tax	(4,176)		18,434		27,385	18,954
Ending balance	(41,062)	(36,886)	(96,607)	(115,041)	(41,062)	(96,607)
AOCI, Securities | Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(9,224)	(8,724)	15,739	16,357	(8,724)	16,357
Other comprehensive (loss)/income before reclassifications	0		0		0	0
Amounts reclassified from AOCI	252		(253)		(248)	(871)
Other comprehensive (loss)/income net of tax	252		(253)		(248)	(871)
Ending balance	(8,972)	(9,224)	15,486	15,739	(8,972)	15,486
AOCI, Cash Flow Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	41,992	37,026	39,440	48,361	37,026	48,361
Other comprehensive (loss)/income before reclassifications	3,162		11,352		12,418	5,900
Amounts reclassified from AOCI	(4,261)		(4,022)		(8,551)	(7,491)
Other comprehensive (loss)/income net of tax	(1,099)		7,330		3,867	(1,591)
Ending balance	$ 40,893	$ 41,992	$ 46,770	$ 39,440	$ 40,893	$ 46,770