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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Defined contribution plan expense | $ 6,700 | $ 6,900 | $ 6,500
Defined contribution plan, employer matching contribution percent | 4.00% |  |
Deferred compensation liability | $ 45,975 | 44,293 |
Carrying value of shares held in trust for stock related compensation plans | 6,563 | 6,905 |
Cash surrender value of bank-owned life insurance policies | 304,400 | 297,600 |
Supplemental Retirement and Salary Contribution Plans [Member] |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred compensation plans expense | 2,500 | 2,000 | $ 3,300
Deferred compensation liability | 36,100 | 37,100 |
Deferred Compensation Plans and Rabbi Trusts [Member] |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Deferred compensation liability | 15,800 | 14,500 |
Carrying value of shares held in trust for stock related compensation plans | $ 6,600 | $ 6,900 |

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