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FAIR VALUE DISCLOSURES - Assets and Liabilities Measured At Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Total debt securities | $ 1,522,535 | $ 1,398,558
Debt Securities, Available-for-sale, Total |  | 1,398,558
Mortgage banking derivative | 19,485 | 14,309
Interest rate swap derivative | 19,485 | 14,309
Liabilities: |  |
Mortgage banking derivative | 19,499 | 14,329
Interest rate swap derivative | 19,499 | 14,329
Fair Value, Measurements, Recurring |  |
Assets: |  |
U.S. Treasury securities | 2,246 | 900
U.S. government sponsored agency securities | 152,892 | 143,452
Mortgage-backed securities: residential | 596,321 | 486,676
Mortgage-backed securities: commercial | 96 | 523
State and municipal securities | 770,980 | 767,007
Total debt securities | 1,522,535 |
Debt Securities, Available-for-sale, Total |  | 1,398,558
Mortgage banking derivative | 257 | 398
Interest rate swap derivative | 19,485 | 14,309
Total assets | 1,542,277 | 1,413,265
Liabilities: |  |
Mortgage banking derivative | 3 | 2
Interest rate swap derivative | 19,499 | 14,329
Total liabilities | 19,502 | 14,331
Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
U.S. Treasury securities | 2,246 | 900
U.S. government sponsored agency securities | 0 | 0
Mortgage-backed securities: residential | 0 | 0
Mortgage-backed securities: commercial | 0 | 0
State and municipal securities | 0 | 0
Total debt securities | 2,246 |
Debt Securities, Available-for-sale, Total |  | 900
Mortgage banking derivative | 0 | 0
Interest rate swap derivative | 0 | 0
Total assets | 2,246 | 900
Liabilities: |  |
Mortgage banking derivative | 0 | 0
Interest rate swap derivative | 0 | 0
Total liabilities | 0 | 0
Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
U.S. Treasury securities | 0 | 0
U.S. government sponsored agency securities | 152,892 | 143,452
Mortgage-backed securities: residential | 596,321 | 486,676
Mortgage-backed securities: commercial | 96 | 523
State and municipal securities | 768,663 | 764,964
Total debt securities | 1,517,972 |
Debt Securities, Available-for-sale, Total |  | 1,395,615
Mortgage banking derivative | 257 | 398
Interest rate swap derivative | 19,485 | 14,309
Total assets | 1,537,714 | 1,410,322
Liabilities: |  |
Mortgage banking derivative | 3 | 2
Interest rate swap derivative | 19,499 | 14,329
Total liabilities | 19,502 | 14,331
Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
U.S. Treasury securities | 0 | 0
U.S. government sponsored agency securities | 0 | 0
Mortgage-backed securities: residential | 0 | 0
Mortgage-backed securities: commercial | 0 | 0
State and municipal securities | 2,317 | 2,043
Total debt securities | 2,317 |
Debt Securities, Available-for-sale, Total |  | 2,043
Mortgage banking derivative | 0 | 0
Interest rate swap derivative | 0 | 0
Total assets | 2,317 | 2,043
Liabilities: |  |
Mortgage banking derivative | 0 | 0
Interest rate swap derivative | 0 | 0
Total liabilities | $ 0 | $ 0

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