SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other comprehensive income/(loss):
Other comprehensive income/(loss) before tax	$ 35,440	$ 13,542	$ (69,235)
Provision (Benefit)
Other comprehensive income/(loss), provision (benefit)	7,442	2,844	(14,539)
After Tax
Unrealized (losses) / gain, after tax	45,662	26,888	(53,936)
Less reclassification adjustments, provision (benefit)	(17,664)	(16,190)	(760)
Other comprehensive income/(loss) net of tax	27,998	10,698	(54,696)
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income/(loss):
Other comprehensive income/(loss) before tax	35,440	13,542	(69,235)
Provision (Benefit)
Other comprehensive income/(loss), provision (benefit)	7,442	2,844	(14,539)
After Tax
Other comprehensive income/(loss) net of tax	27,998	10,698	(54,696)
Securities | Available-for-Sale Securities
Other comprehensive income/(loss):
Unrealized (losses) / gain, before tax	40,145	59,640	(137,500)
Other comprehensive income/(loss) before tax	39,078	59,640	(137,506)
Provision (Benefit)
Unrealized (losses) / gain, provision (benefit)	8,430	12,526	(28,876)
Other comprehensive income/(loss), provision (benefit)	8,206	12,526	(28,877)
After Tax
Unrealized (losses) / gain, after tax	31,715	47,114	(108,624)
Other comprehensive income/(loss) net of tax	30,872	47,114	(108,629)
Securities | Held-to-Maturity Securities
Other comprehensive income/(loss):
Unrealized (losses) / gain, before tax	0	(31,898)	0
Less reclassification adjustments, before tax	(636)	148	259
Other comprehensive income/(loss) before tax	(636)	(31,750)	259
Provision (Benefit)
Unrealized (losses) / gain, provision (benefit)	0	(6,699)	0
Less reclassification adjustments, provision (benefit)	(134)	30	55
Other comprehensive income/(loss), provision (benefit)	(134)	(6,669)	55
After Tax
Unrealized (losses) / gain, after tax	0	(25,199)	0
Less reclassification adjustments, provision (benefit)	(502)	118	204
Other comprehensive income/(loss) net of tax	(502)	(25,081)	204
Securities | Gain on sale of available-for sale investment securities | Available-for-Sale Securities
Other comprehensive income/(loss):
Less reclassification adjustments, before tax	(1,052)	0	0
Provision (Benefit)
Less reclassification adjustments, provision (benefit)	(221)	0	0
After Tax
Less reclassification adjustments, provision (benefit)	(831)	0	0
Securities | Other income | Available-for-Sale Securities
Other comprehensive income/(loss):
Less reclassification adjustments, before tax	(15)	0	(6)
Provision (Benefit)
Less reclassification adjustments, provision (benefit)	(3)	0	(1)
After Tax
Less reclassification adjustments, provision (benefit)	(12)	0	(5)
Cash Flow Hedges
Other comprehensive income/(loss):
Unrealized (losses) / gain, before tax	17,655	6,295	69,225
Less reclassification adjustments, before tax	(20,657)	(20,643)	(1,213)
Other comprehensive income/(loss) before tax	(3,002)	(14,348)	68,012
Provision (Benefit)
Unrealized (losses) / gain, provision (benefit)	3,708	1,322	14,537
Less reclassification adjustments, provision (benefit)	(4,338)	(4,335)	(254)
Other comprehensive income/(loss), provision (benefit)	(630)	(3,013)	14,283
After Tax
Unrealized (losses) / gain, after tax	13,947	4,973	54,688
Less reclassification adjustments, provision (benefit)	(16,319)	(16,308)	(959)
Other comprehensive income/(loss) net of tax	$ (2,372)	$ (11,335)	$ 53,729