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SECURITIES - Schedule of Securities with Unrealized Losses, Segregated by the Duration of their Continuous Unrealized Loss Positions (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses $ 40,176 $ 14,528
Less Than Twelve Months, Fair Value 443,798 712,488
Over Twelve Months, Gross Unrealized Losses 198,391 7,868
Over Twelve Months, Fair Value 938,147 252,279
Total Gross Unrealized Losses 238,567 22,396
Total Fair Value 1,381,945 964,767
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 8,958 4,610
Less Than Twelve Months, Fair Value 187,307 194,606
Over Twelve Months, Gross Unrealized Losses 67,730 4,398
Over Twelve Months, Fair Value 239,115 113,891
Total Gross Unrealized Losses 76,688 9,008
Total Fair Value 426,422 308,497
Securities available for sale and held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 49,134 19,138
Less Than Twelve Months, Fair Value 631,105 907,094
Over Twelve Months, Gross Unrealized Losses 266,121 12,266
Over Twelve Months, Fair Value 1,177,262 366,170
Total Gross Unrealized Losses 315,255 31,404
Total Fair Value 1,808,367 1,273,264
Municipal bonds and obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 2,406  
Less Than Twelve Months, Fair Value 36,696  
Over Twelve Months, Gross Unrealized Losses 624  
Over Twelve Months, Fair Value 2,763  
Total Gross Unrealized Losses 3,030  
Total Fair Value 39,459  
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 5,476 693
Less Than Twelve Months, Fair Value 125,494 36,981
Over Twelve Months, Gross Unrealized Losses 18,228 0
Over Twelve Months, Fair Value 38,341 0
Total Gross Unrealized Losses 23,704 693
Total Fair Value 163,835 36,981
Agency collateralized mortgage obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 23,052 9,626
Less Than Twelve Months, Fair Value 247,509 375,132
Over Twelve Months, Gross Unrealized Losses 76,735 1,386
Over Twelve Months, Fair Value 284,434 27,025
Total Gross Unrealized Losses 99,787 11,012
Total Fair Value 531,943 402,157
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 2,734 1,808
Less Than Twelve Months, Fair Value 49,539 49,308
Over Twelve Months, Gross Unrealized Losses 17,686 1,705
Over Twelve Months, Fair Value 58,177 36,212
Total Gross Unrealized Losses 20,420 3,513
Total Fair Value 107,716 85,520
Agency mortgage-backed securities    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 3,124 3,179
Less Than Twelve Months, Fair Value 37,540 222,887
Over Twelve Months, Gross Unrealized Losses 93,872 4,463
Over Twelve Months, Fair Value 508,683 175,941
Total Gross Unrealized Losses 96,996 7,642
Total Fair Value 546,223 398,828
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 300 839
Less Than Twelve Months, Fair Value 2,419 26,656
Over Twelve Months, Gross Unrealized Losses 8,940 659
Over Twelve Months, Fair Value 39,299 26,025
Total Gross Unrealized Losses 9,240 1,498
Total Fair Value 41,718 52,681
Agency commercial mortgage-backed securities    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 9,885 1,609
Less Than Twelve Months, Fair Value 96,396 103,354
Over Twelve Months, Gross Unrealized Losses 25,865 2,019
Over Twelve Months, Fair Value 132,043 49,313
Total Gross Unrealized Losses 35,750 3,628
Total Fair Value 228,439 152,667
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 447 1,255
Less Than Twelve Months, Fair Value 9,713 80,406
Over Twelve Months, Gross Unrealized Losses 22,756 2,034
Over Twelve Months, Fair Value 102,290 51,654
Total Gross Unrealized Losses 23,203 3,289
Total Fair Value 112,003 132,060
Corporate bonds    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 1,709 114
Less Than Twelve Months, Fair Value 25,657 11,115
Over Twelve Months, Gross Unrealized Losses 1,229 0
Over Twelve Months, Fair Value 9,929 0
Total Gross Unrealized Losses 2,938 114
Total Fair Value 35,586 11,115
Other bonds and obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 0  
Less Than Twelve Months, Fair Value 0  
Over Twelve Months, Gross Unrealized Losses 66  
Over Twelve Months, Fair Value 295  
Total Gross Unrealized Losses 66  
Total Fair Value 295  
Securities held to maturity    
Total Gross Unrealized Losses 0 0
Tax advantaged economic development bonds    
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 1 15
Less Than Twelve Months, Fair Value 142 1,255
Over Twelve Months, Gross Unrealized Losses 120 0
Over Twelve Months, Fair Value 1,008 0
Total Gross Unrealized Losses 121 15
Total Fair Value $ 1,150 $ 1,255