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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, 2023
Dec. 31, 2022
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses $ 534 $ 40,176
Less Than Twelve Months, Fair Value 15,891 443,798
Over Twelve Months, Gross Unrealized Losses 188,991 198,391
Over Twelve Months, Fair Value 965,075 938,147
Total Gross Unrealized Losses 189,525 238,567
Total Fair Value 980,966 1,381,945
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 230 8,958
Less Than Twelve Months, Fair Value 28,916 187,307
Over Twelve Months, Gross Unrealized Losses 67,597 67,730
Over Twelve Months, Fair Value 332,661 239,115
Total Gross Unrealized Losses 67,827 76,688
Total Fair Value 361,577 426,422
Securities available for sale and held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 764 49,134
Less Than Twelve Months, Fair Value 44,807 631,105
Over Twelve Months, Gross Unrealized Losses 256,588 266,121
Over Twelve Months, Fair Value 1,297,736 1,177,262
Total Gross Unrealized Losses 257,352 315,255
Total Fair Value 1,342,543 1,808,367
Municipal bonds and obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 76 2,406
Less Than Twelve Months, Fair Value 9,326 36,696
Over Twelve Months, Gross Unrealized Losses 1,353 624
Over Twelve Months, Fair Value 22,739 2,763
Total Gross Unrealized Losses 1,429 3,030
Total Fair Value 32,065 39,459
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 229 5,476
Less Than Twelve Months, Fair Value 28,895 125,494
Over Twelve Months, Gross Unrealized Losses 16,758 18,228
Over Twelve Months, Fair Value 92,063 38,341
Total Gross Unrealized Losses 16,987 23,704
Total Fair Value 120,958 163,835
Agency collateralized mortgage obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 0 23,052
Less Than Twelve Months, Fair Value 0 247,509
Over Twelve Months, Gross Unrealized Losses 79,112 76,735
Over Twelve Months, Fair Value 347,874 284,434
Total Gross Unrealized Losses 79,112 99,787
Total Fair Value 347,874 531,943
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 1 2,734
Less Than Twelve Months, Fair Value 21 49,539
Over Twelve Months, Gross Unrealized Losses 18,359 17,686
Over Twelve Months, Fair Value 94,548 58,177
Total Gross Unrealized Losses 18,360 20,420
Total Fair Value 94,569 107,716
Agency mortgage-backed securities    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 1 3,124
Less Than Twelve Months, Fair Value 22 37,540
Over Twelve Months, Gross Unrealized Losses 75,154 93,872
Over Twelve Months, Fair Value 417,151 508,683
Total Gross Unrealized Losses 75,155 96,996
Total Fair Value 417,173 546,223
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 0 300
Less Than Twelve Months, Fair Value 0 2,419
Over Twelve Months, Gross Unrealized Losses 8,052 8,940
Over Twelve Months, Fair Value 39,327 39,299
Total Gross Unrealized Losses 8,052 9,240
Total Fair Value 39,327 41,718
Agency commercial mortgage-backed securities    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 0 9,885
Less Than Twelve Months, Fair Value 0 96,396
Over Twelve Months, Gross Unrealized Losses 29,553 25,865
Over Twelve Months, Fair Value 145,326 132,043
Total Gross Unrealized Losses 29,553 35,750
Total Fair Value 145,326 228,439
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 0 447
Less Than Twelve Months, Fair Value 0 9,713
Over Twelve Months, Gross Unrealized Losses 24,368 22,756
Over Twelve Months, Fair Value 105,801 102,290
Total Gross Unrealized Losses 24,368 23,203
Total Fair Value 105,801 112,003
Corporate bonds    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 457 1,709
Less Than Twelve Months, Fair Value 6,543 25,657
Over Twelve Months, Gross Unrealized Losses 3,753 1,229
Over Twelve Months, Fair Value 31,690 9,929
Total Gross Unrealized Losses 4,210 2,938
Total Fair Value 38,233 35,586
Other bonds and obligations    
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 0 0
Less Than Twelve Months, Fair Value 0 0
Over Twelve Months, Gross Unrealized Losses 66 66
Over Twelve Months, Fair Value 295 295
Total Gross Unrealized Losses 66 66
Total Fair Value 295 295
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 0 1
Less Than Twelve Months, Fair Value 0 142
Over Twelve Months, Gross Unrealized Losses 60 120
Over Twelve Months, Fair Value 922 1,008
Total Gross Unrealized Losses 60 121
Total Fair Value $ 922 $ 1,150