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SHAREHOLDERS’ EQUITY - Pre-tax and After-tax Changes in the Components of Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax [Abstract]        
Change in unrealized gain (loss) on available-for-sale debt securities, before tax $ (60,539) $ (10,479) $ (232,457) $ (21,226)
Change in unrealized gain (loss) on available-for-sale debt securities, tax (15,256) (2,609) (58,579) (5,285)
Change in unrealized gain (loss) on available-for-sale debt securities, after tax (45,283) (7,870) (173,878) (15,941)
Other Comprehensive Loss, Held-to-maturity Security, OTTI, after Tax and Adjustments [Abstract]        
Reclassification of gain on held-to-maturity securities, before tax (865) (1,072) (2,743) (3,716)
Reclassification of gain on held-to-maturity securities, tax (218) (267) (691) (925)
Reclassification of gain on held-to-maturity securities, after tax (647) (805) (2,052) (2,791)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent [Abstract]        
Change in unrealized gain (loss) on cash flow hedges arising during the period, before tax 1,557 12 4,615 867
Change in unrealized gain (loss) on cash flow hedges arising during the period, tax 392 3 1,164 216
Change in unrealized gain (loss) on cash flow hedges arising during the period, after tax 1,165 9 3,451 651
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]        
Reclassification of loss on cash flow hedges, before tax 73 395 682 1,149
Reclassification of loss on cash flow hedges, tax 18 99 171 286
Reclassification of loss on cash flow hedges, after tax (55) (296) (511) (863)
OCI, Net of Tax [Abstract]        
Total other comprehensive income (loss), before tax (59,774) (11,144) (229,903) (22,926)
Total other comprehensive income (loss), tax (15,064) (2,774) (57,935) (5,708)
Total other comprehensive loss, after-tax $ (44,710) $ (8,370) $ (171,968) $ (17,218)