SHAREHOLDERS’ EQUITY - Changes in Accumulated Other Comprehensive Income After-tax By Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,447,412	$ 1,118,301	$ 1,529,116	$ 1,078,975
Ending balance	1,446,218	1,439,635	1,446,218	1,439,635
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(108,481)	28,272	18,777	37,120
Net change	(44,710)	(8,370)	(171,968)	(17,218)
Transfer from available-for-sale to held-to-maturity			0
Ending balance	(153,191)	19,902	(153,191)	19,902
Net Unrealized Gain (Loss) on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(123,521)	14,250	5,271	22,320
Net change	(45,283)	(7,870)	(173,878)	(15,940)
Transfer from available-for-sale to held-to-maturity			(197)
Ending balance	(168,804)	6,380	(168,804)	6,380
Unamortized Gain (Loss) on Held-to-Maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	14,476	17,322	15,684	19,308
Net change	(647)	(805)	(2,052)	(2,791)
Transfer from available-for-sale to held-to-maturity			197
Ending balance	13,829	16,517	13,829	16,517
Net Unrealized Gain (Loss) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	564	(3,300)	(2,178)	(4,508)
Net change	1,220	305	3,962	1,513
Transfer from available-for-sale to held-to-maturity			0
Ending balance	$ 1,784	$ (2,995)	$ 1,784	$ (2,995)