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EMPLOYEE BENEFITS - Amounts Recognized as a Component of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Retirement Plan |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |
Net gain (loss) | $ (21,356) | $ (22,800)
Deferred tax (expense) benefit | 4,485 | 4,788
Accumulated other comprehensive income (loss), net of tax | (16,871) | (18,012)
Retirement Plan Acquired |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |
Net gain (loss) | 113 | 100
Deferred tax (expense) benefit | (24) | (21)
Accumulated other comprehensive income (loss), net of tax | 89 | 79
Restoration Plan |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |
Net gain (loss) | (2,511) | (1,986)
Deferred tax (expense) benefit | 527 | 417
Accumulated other comprehensive income (loss), net of tax | $ (1,984) | $ (1,569)

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