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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Pension Cost (Reversal of Cost) | $ 3,515 | $ 2,002 | $ 3,365 |
Payment for Pension Benefits | $ 0 | 0 | 0 |
Defined Contribution Plan, Maximum Annual Contribution Percent by Employee | 50.00% |  |  |
Defined Contribution Plan, Cost | $ 0 | 0 | 0 |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year | 0 |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |
Benefit obligation at beginning of year | 80,006 | 93,271 |  |
Service cost | $ 9,291 | 9,065 | 9,128 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Noninterest Expense |  |  |
Interest cost | $ 4,279 | $ 2,585 | 2,157 |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Other Noninterest Expense |  |
Actuarial gain (loss) | 6,687 | $ (16,655) |  |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 6,830 | 8,260 |  |
Benefit obligation at end of year | 93,433 | 80,006 | 93,271 |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at beginning of year | 133,449 | 163,382 |  |
Actual return on plan assets | 17,921 | (21,673) |  |
Defined Benefit Plan, Plan Assets, Benefits Paid | 6,830 | 8,260 |  |
Fair value of plan assets at end of year | 144,540 | 133,449 | 163,382 |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |  |
Assets | 51,106 | 53,443 |  |
Liabilities | 0 | 0 |  |
Net amount recognized | 51,106 | 53,443 |  |
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract] |  |  |  |
Net actuarial loss | 40,459 | 41,628 |  |
Net prior service cost | 22 | 32 |  |
Deferred tax assets | (9,364) | (9,637) |  |
Net amount recognized | 31,117 | 32,023 | 20,846 | $ 24,912
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax | (906) | 11,177 | (4,066) |
Accumulated benefit obligation | 92,953 | 79,236 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |  |
Service cost | 9,291 | 9,065 | 9,128 |
Interest cost | 4,279 | 2,585 | 2,157 |
Expected return on plan assets | (10,802) |  | $ (10,118) |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Noninterest Expense |
Amortization of prior service cost | 10 | (302) | $ (413) |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Other Noninterest Expense |
Defined Benefit Plan, Amortization of Gain (Loss) | 737 | 1,636 | $ 2,611 |
Net periodic benefit (income) cost | 3,515 | 2,002 | 3,365 |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] |  |  |  |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax | (432) | 16,001 | (3,068) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax | 0 | 0 | 0 |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax | (10) | 302 | 413 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (737) | (1,636) | (2,611) |
Total recognized in accumulated other comprehensive income | (1,179) | 14,667 | (5,266) |
Total recognized in net periodic benefit cost and accumulated other comprehensive income | $ 2,336 | $ 16,669 | $ (1,901) |
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |  |
Discount rate | 5.18% | 5.50% | 2.89% |
Rate of compensation increase | 3.50% | 3.50% | 3.50% |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate | 4.93% | 5.20% | 2.58% |
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |
Discount rate | 5.50% | 2.89% | 2.55% |
Expected return on plan assets | 7.25% | 7.25% | 7.25% |
Rate of compensation increase | 3.50% | 3.50% | 3.50% |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate | 5.20% | 2.58% | 2.14% |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
2024 | $ 6,184 |  |  |
2025 | 6,994 |  |  |
2026 | 6,772 |  |  |
2027 | 8,137 |  |  |
2028 | 7,645 |  |  |
Thereafter | 49,048 |  |  |
Pension Plan |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 144,540 |  |  |
Pension Plan | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 127,516 |  |  |
Pension Plan | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 2,751 |  |  |
Pension Plan | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Pension Plan | Cash | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 193 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | $ 158 |  |
Pension Plan | Cash | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 193 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 158 |  |
Pension Plan | Cash | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Cash | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 2,751 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 4,602 |  |
Pension Plan | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 2,751 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 4,602 |  |
Pension Plan | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Fixed income mutual funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 53,022 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 47,234 |  |
Pension Plan | Fixed income mutual funds | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 53,022 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 47,234 |  |
Pension Plan | Fixed income mutual funds | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Fixed income mutual funds | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Equity mutual funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 74,301 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 67,316 |  |
Pension Plan | Equity mutual funds | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 74,301 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 67,316 |  |
Pension Plan | Equity mutual funds | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Equity mutual funds | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Pension Plans Defined Benefit Total Assets in Fair Value Hierarchy Member | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount | 130,267 | 119,310 |  |
Pension Plan | Pension Plans Defined Benefit Total Assets in Fair Value Hierarchy Member | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 114,708 |  |
Pension Plan | Pension Plans Defined Benefit Total Assets in Fair Value Hierarchy Member | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 4,602 |  |
Pension Plan | Pension Plans Defined Benefit Total Assets in Fair Value Hierarchy Member | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 14,273 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 14,139 |  |
Pension Plan | Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |
Fair value of plan assets at end of year | $ 0 |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 0 |  |
Pension Plan | Defined Benefit Pension Plan Investments at Fair Value Member |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 133,449 |  |
Pension Plan | Defined Benefit Pension Plan Investments at Fair Value Member | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 114,708 |  |
Pension Plan | Defined Benefit Pension Plan Investments at Fair Value Member | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | 4,602 |  |
Pension Plan | Defined Benefit Pension Plan Investments at Fair Value Member | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount |  | $ 0 |  |

X
- Definition Comprehensive Income (Loss), Recognized in Net Periodic Benefit Cost and Accumulated Other Comprehensive Income + References No definition available. + Details
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- Definition Defined Contribution Plan, Maximum Annual Contribution Percent of earnings which participant/employee may contribute into the plan, not to exceed applicable limitations prescribed by the IRS. + References No definition available. + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i-k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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