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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Based Compensation Paragraphs (Details) - USD ($) | 1 Months Ended | 12 Months Ended
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Jan. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  | 1 year |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |  |  | $ 25,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  | 76,000 | $ 97,000 | $ 128,000
Share-based Payment Arrangement, Expense |  |  | 1,260,000 | 1,214,000 | 1,050,000
Forecast |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Payment Arrangement, Expense |  | $ 1,500,000 |  |  |
Share-based Payment Arrangement, Option [Member] |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  | 0 | 0 | 0
Restricted Stock |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  |  | $ 1,678,000 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  |  | 1 year 4 months 24 days |  |
Granted (in shares) |  |  | 78,243 |  |
Share-based Payment Arrangement, Expense |  |  | $ 1,260,000 | $ 1,214,000 | $ 1,050,000
Stock Incentive Plan |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  | 850,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  | 52,128 |  |
Stock Incentive Plan | Share-based Payment Arrangement, Option [Member] |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 6 months |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  | 10 years |  |
Stock Incentive Plan | Restricted Stock | Subsequent event |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) | 3 years |  |  |  |
Granted (in shares) | 42,788 |  |  |  |
Stock Incentive Plan | Restricted Stock | Employees |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 3 years | 3 years |
Stock Incentive Plan | Performance Shares | Employees |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 3 years | 3 years |
Independent Directors Stock Incentive Plan |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  | 235,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  | 87,520 |  |
Independent Directors Stock Incentive Plan | Restricted Stock | Subsequent event |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) | 1 year |  |  |  |
Granted (in shares) | 11,000 |  |  |  |
Independent Directors Stock Incentive Plan | Restricted Stock | Director [Member] |  |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 1 year | 1 year |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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