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, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,525,646	$ 1,489,026	$ 1,480,343	$ 1,411,863	$ 1,489,026	$ 1,411,863
Other comprehensive (loss)/income before reclassifications	(13,121)		(180)		482	40,641
Amounts reclassified from AOCI	(2,736)		(4,843)		(6,000)	(9,637)
Other comprehensive (loss)/income net of tax	(15,857)	10,339	(5,023)	36,027	(5,518)	31,004
Ending balance	1,544,307	1,525,646	1,500,979	1,480,343	1,544,307	1,500,979
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,808)	(12,147)	(4,118)	(40,145)	(12,147)	(40,145)
Other comprehensive (loss)/income net of tax	(15,857)	10,339	(5,023)	36,027
Ending balance	(17,665)	(1,808)	(9,141)	(4,118)	(17,665)	(9,141)
Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(20,384)	(37,575)	(36,886)	(68,447)	(37,575)	(68,447)
Other comprehensive (loss)/income before reclassifications	(11,727)		(3,342)		5,467	28,223
Amounts reclassified from AOCI	(2)		(834)		(5)	(838)
Other comprehensive (loss)/income net of tax	(11,729)		(4,176)		5,462	27,385
Ending balance	(32,113)	(20,384)	(41,062)	(36,886)	(32,113)	(41,062)
Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(9,465)	(9,226)	(9,224)	(8,724)	(9,226)	(8,724)
Other comprehensive (loss)/income before reclassifications	0		0		0	0
Amounts reclassified from AOCI	225		252		(14)	(248)
Other comprehensive (loss)/income net of tax	225		252		(14)	(248)
Ending balance	(9,240)	(9,465)	(8,972)	(9,224)	(9,240)	(8,972)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	28,041	34,654	41,992	37,026	34,654	37,026
Other comprehensive (loss)/income before reclassifications	(1,394)		3,162		(4,985)	12,418
Amounts reclassified from AOCI	(2,959)		(4,261)		(5,981)	(8,551)
Other comprehensive (loss)/income net of tax	(4,353)		(1,099)		(10,966)	3,867
Ending balance	$ 23,688	$ 28,041	$ 40,893	$ 41,992	$ 23,688	$ 40,893