SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,544,307	$ 1,525,646	$ 1,489,026	$ 1,500,979	$ 1,480,343	$ 1,411,863	$ 1,489,026	$ 1,411,863
Other comprehensive income/(loss) before reclassifications	15,221			11,157			15,703	51,797
Amounts reclassified from AOCI	(2,987)			(4,570)			(8,987)	(14,206)
Other comprehensive income net of tax	12,234	(15,857)	10,339	6,587	(5,023)	36,027	6,716	37,591
Ending balance	1,687,083	1,544,307	1,525,646	1,462,344	1,500,979	1,480,343	1,687,083	1,462,344
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(17,665)	(1,808)	(12,147)	(9,141)	(4,118)	(40,145)	(12,147)	(40,145)
Other comprehensive income net of tax	12,234	(15,857)	10,339	6,587	(5,023)	36,027
Ending balance	(5,431)	(17,665)	(1,808)	(2,554)	(9,141)	(4,118)	(5,431)	(2,554)
Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(32,113)		(37,575)	(41,062)		(68,447)	(37,575)	(68,447)
Other comprehensive income/(loss) before reclassifications	14,912			20,820			20,379	49,042
Amounts reclassified from AOCI	(2)			(3)			(7)	(840)
Other comprehensive income net of tax	14,910			20,817			20,372	48,202
Ending balance	(17,203)	(32,113)		(20,245)	(41,062)		(17,203)	(20,245)
Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(9,240)		(9,226)	(8,972)		(8,724)	(9,226)	(8,724)
Other comprehensive income/(loss) before reclassifications	0			0			0	0
Amounts reclassified from AOCI	(147)			(350)			(161)	(598)
Other comprehensive income net of tax	(147)			(350)			(161)	(598)
Ending balance	(9,387)	(9,240)		(9,322)	(8,972)		(9,387)	(9,322)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	23,688		$ 34,654	40,893		$ 37,026	34,654	37,026
Other comprehensive income/(loss) before reclassifications	309			(9,663)			(4,676)	2,755
Amounts reclassified from AOCI	(2,838)			(4,217)			(8,819)	(12,768)
Other comprehensive income net of tax	(2,529)			(13,880)			(13,495)	(10,013)
Ending balance	$ 21,159	$ 23,688		$ 27,013	$ 40,893		$ 21,159	$ 27,013