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SECURITIES - Investments in a Continuous Unrealized Loss Position (Details) $ in Thousands | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 02, 2023 USD ($) | Jun. 30, 2023 USD ($) item | Dec. 31, 2022 USD ($)
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | $ (4,637) | $ (37,977)
12 Months or More |  | (85,527) | (53,061)
Total Unrealized Loss of Available-for-sale securities |  | (90,164) | (91,038)
Held-to-maturity: Unrealized Loss |  |  |
Less than 12 Months |  |  | (22,823)
12 Months or More |  |  | (40,171)
Total Unrealized Loss of Held-to-maturity securities |  |  | (62,994)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 123,018 | 531,226
12 Months or More |  | 694,429 | 299,159
Total Fair Value Available-for-sale securities |  | $ 817,447 | 830,385
Held-to-maturity: Fair value |  |  |
Less than 12 Months |  |  | 220,934
12 Months or More |  |  | 239,252
Total Fair Value Held-to-maturity securities |  |  | 460,186
Total: Unrealized Losses |  |  |
Less Than 12 Months |  |  | (60,800)
12 Months or More |  |  | (93,232)
Total Unrealized Losses |  |  | (154,032)
Total: Fair Value |  |  |
Less than 12 Months |  |  | 752,160
12 Months or More |  |  | 538,411
Total Fair Value |  |  | 1,290,571
Number of securities in an unrealized loss position for a period of twelve months or more | item |  | 587 |
Number of securities in an unrealized loss position for a period of less than twelve months | item |  | 350 |
Proceeds from sales of securities available-for-sale | $ 39,400 | $ 145,844 |
U.S. Treasury |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  |  | (8,401)
12 Months or More |  | (14,648) | (6,944)
Total Unrealized Loss of Available-for-sale securities |  | (14,648) | (15,345)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  |  | 92,445
12 Months or More |  | 155,140 | 62,070
Total Fair Value Available-for-sale securities |  | 155,140 | 154,515
U.S. government agency |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | (270) | (2,980)
12 Months or More |  | (4,139) | (1,154)
Total Unrealized Loss of Available-for-sale securities |  | (4,409) | (4,134)
Held-to-maturity: Unrealized Loss |  |  |
Less than 12 Months |  |  | (1,754)
12 Months or More |  |  | (7,974)
Total Unrealized Loss of Held-to-maturity securities |  |  | (9,728)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 7,973 | 47,370
12 Months or More |  | 44,451 | 7,787
Total Fair Value Available-for-sale securities |  | 52,424 | 55,157
Held-to-maturity: Fair value |  |  |
Less than 12 Months |  |  | 15,751
12 Months or More |  |  | 62,945
Total Fair Value Held-to-maturity securities |  |  | 78,696
Municipal securities |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | (723) | (10,906)
12 Months or More |  | (28,503) | (21,283)
Total Unrealized Loss of Available-for-sale securities |  | (29,226) | (32,189)
Held-to-maturity: Unrealized Loss |  |  |
Less than 12 Months |  |  | (314)
Total Unrealized Loss of Held-to-maturity securities |  |  | (314)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 47,645 | 149,261
12 Months or More |  | 192,219 | 87,794
Total Fair Value Available-for-sale securities |  | 239,864 | 237,055
Held-to-maturity: Fair value |  |  |
Less than 12 Months |  |  | 23,433
Total Fair Value Held-to-maturity securities |  |  | 23,433
Mortgage-backed: Agency residential |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | (1,305) | (8,332)
12 Months or More |  | (17,615) | (9,908)
Total Unrealized Loss of Available-for-sale securities |  | (18,920) | (18,240)
Held-to-maturity: Unrealized Loss |  |  |
Less than 12 Months |  |  | (4,039)
12 Months or More |  |  | (2,431)
Total Unrealized Loss of Held-to-maturity securities |  |  | (6,470)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 36,555 | 127,288
12 Months or More |  | 152,961 | 65,692
Total Fair Value Available-for-sale securities |  | 189,516 | 192,980
Held-to-maturity: Fair value |  |  |
Less than 12 Months |  |  | 78,452
12 Months or More |  |  | 17,806
Total Fair Value Held-to-maturity securities |  |  | 96,258
Mortgage-backed: Agency commercial |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | (345) | (4,764)
12 Months or More |  | (16,694) | (12,408)
Total Unrealized Loss of Available-for-sale securities |  | (17,039) | (17,172)
Held-to-maturity: Unrealized Loss |  |  |
Less than 12 Months |  |  | (16,716)
12 Months or More |  |  | (29,766)
Total Unrealized Loss of Held-to-maturity securities |  |  | (46,482)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 13,093 | 62,672
12 Months or More |  | 117,701 | 70,216
Total Fair Value Available-for-sale securities |  | 130,794 | 132,888
Held-to-maturity: Fair value |  |  |
Less than 12 Months |  |  | 103,298
12 Months or More |  |  | 158,501
Total Fair Value Held-to-maturity securities |  |  | 261,799
Corporate |  |  |
Available-for-sale: Unrealized Loss |  |  |
Less than 12 Months |  | (1,994) | (2,594)
12 Months or More |  | (3,928) | (1,364)
Total Unrealized Loss of Available-for-sale securities |  | (5,922) | (3,958)
Available-for-sale: Fair Value |  |  |
Less than 12 Months |  | 17,752 | 52,190
12 Months or More |  | 31,957 | 5,600
Total Fair Value Available-for-sale securities |  | $ 49,709 | $ 57,790

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