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LOANS - Total Loans Outstanding (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 5,000,757 | $ 4,919,997 |  |
Percentage of loans receivable | 100.00% | 100.00% |  |
Less: Allowance for credit losses | $ (73,180) | $ (71,972) | $ (71,215) | $ (72,606)
Net deferred loan fees | (3,198) | (3,463) |  |
Loans, net | 4,924,379 | 4,844,562 |  |
Total commercial loans | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 4,442,872 | $ 4,367,788 |  |
Percentage of loans receivable | 88.80% | 88.80% |  |
Total consumer loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 557,885 | $ 552,209 |  |
Percentage of loans receivable | 11.20% | 11.20% |  |
Other consumer loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 97,369 | $ 96,022 |  |
Percentage of loans receivable | 2.00% | 1.90% |  |
Commercial and industrial loans: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 1,477,276 | $ 1,420,764 |  |
Percentage of loans receivable | 29.50% | 28.90% |  |
Commercial and industrial loans: | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less: Allowance for credit losses | $ (30,720) | $ (30,338) | (31,190) | (35,290)
Commercial and industrial loans: | Working capital lines of credit loans | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 646,459 | $ 604,893 |  |
Percentage of loans receivable | 12.90% | 12.30% |  |
Commercial and industrial loans: | Non-working capital loans | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 830,817 | $ 815,871 |  |
Percentage of loans receivable | 16.60% | 16.60% |  |
Commercial real estate and multi-family residential loans: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 2,477,442 | $ 2,437,534 |  |
Percentage of loans receivable | 49.60% | 49.50% |  |
Commercial real estate and multi-family residential loans: | Construction and land development loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 659,712 | $ 634,435 |  |
Percentage of loans receivable | 13.20% | 12.90% |  |
Commercial real estate and multi-family residential loans: | Owner occupied loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 833,410 | $ 825,464 |  |
Percentage of loans receivable | 16.70% | 16.80% |  |
Commercial real estate and multi-family residential loans: | Nonowner occupied loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 744,346 | $ 724,101 |  |
Percentage of loans receivable | 14.90% | 14.70% |  |
Commercial real estate and multi-family residential loans: | Multifamily loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 239,974 | $ 253,534 |  |
Percentage of loans receivable | 4.80% | 5.10% |  |
Agri-business and agricultural loans: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 367,852 | $ 388,764 |  |
Percentage of loans receivable | 7.30% | 7.90% |  |
Agri-business and agricultural loans: | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less: Allowance for credit losses | $ (4,112) | $ (4,150) | $ (4,621) | $ (4,429)
Agri-business and agricultural loans: | Loans secured by farmland | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 167,271 | $ 162,890 |  |
Percentage of loans receivable | 3.30% | 3.30% |  |
Agri-business and agricultural loans: | Loans for agricultural production | Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 200,581 | $ 225,874 |  |
Percentage of loans receivable | 4.00% | 4.60% |  |
Other commercial loans: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 120,302 | $ 120,726 |  |
Percentage of loans receivable | 2.40% | 2.50% |  |
Consumer 1-4 family mortgage loans: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 460,516 | $ 456,187 |  |
Percentage of loans receivable | 9.20% | 9.30% |  |
Consumer 1-4 family mortgage loans: | Closed end first mortgage loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 260,633 | $ 258,103 |  |
Percentage of loans receivable | 5.20% | 5.20% |  |
Consumer 1-4 family mortgage loans: | Open end and junior lien loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 188,927 | $ 189,663 |  |
Percentage of loans receivable | 3.80% | 3.90% |  |
Consumer 1-4 family mortgage loans: | Residential construction and land development loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable before allowance for credit loss | $ 10,956 | $ 8,421 |  |
Percentage of loans receivable | 0.20% | 0.20% |  |

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