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, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 1,717,021	$ 1,718,949	$ 1,525,646	$ 1,489,026	$ 1,718,949	$ 1,489,026
Other comprehensive (loss)/income before reclassifications	(1,894)		(13,121)		(28,084)	482
Amounts reclassified from AOCI	(1,269)		(2,736)		(3,532)	(6,000)
Other comprehensive loss net of tax	(3,163)	(28,453)	(15,857)	10,339	(31,616)	(5,518)
Ending Balance	1,854,434	1,717,021	1,544,307	1,525,646	1,854,434	1,544,307
Accumulated Other comprehensive (loss)/ income:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(15,071)	13,382	(1,808)	(12,147)	13,382	(12,147)
Other comprehensive loss net of tax	(3,163)	(28,453)	(15,857)	10,339
Ending Balance	(18,234)	(15,071)	(17,665)	(1,808)	(18,234)	(17,665)
Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(25,317)	2,811	(20,384)	(37,575)	2,811	(37,575)
Other comprehensive (loss)/income before reclassifications	(4,500)		(11,727)		(32,626)	5,467
Amounts reclassified from AOCI	(2)		(2)		(4)	(5)
Other comprehensive loss net of tax	(4,502)		(11,729)		(32,630)	5,462
Ending Balance	(29,819)	(25,317)	(32,113)	(20,384)	(29,819)	(32,113)
Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(9,555)	(9,246)	(9,465)	(9,226)	(9,246)	(9,226)
Other comprehensive (loss)/income before reclassifications	0		0		0	0
Amounts reclassified from AOCI	676		225		367	(14)
Other comprehensive loss net of tax	676		225		367	(14)
Ending Balance	(8,879)	(9,555)	(9,240)	(9,465)	(8,879)	(9,240)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	19,801	19,817	28,041	34,654	19,817	34,654
Other comprehensive (loss)/income before reclassifications	2,606		(1,394)		4,542	(4,985)
Amounts reclassified from AOCI	(1,943)		(2,959)		(3,895)	(5,981)
Other comprehensive loss net of tax	663		(4,353)		647	(10,966)
Ending Balance	$ 20,464	$ 19,801	$ 23,688	$ 28,041	$ 20,464	$ 23,688