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PENSION AND OTHER POSTRETIREMENT PLANS (Schedule of Fair Values of Pension Plan and Postretirement Plan Assets by Asset Category) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 2,303 | $ 2,349 | $ 2,472
Pension plan assets | 2,303 | 2,346 |
Pension Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 923 | 962 |
Pension Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 104 | 124 |
Pension Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 106 | 129 |
Pension Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 73 | 105 |
Pension Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 193 | 202 |
Pension Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 273 | 526 |
Pension Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 572 | 205 |
Pension Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 59 | 93 |
Pension Benefits | Interest and dividend income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets |  | 3 |
SERP Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 848 | 879 | $ 914
Pension plan assets | 848 | 878 |
SERP Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 327 | 360 |
SERP Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 38 | 23 |
SERP Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 38 | 72 |
SERP Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 27 | 37 |
SERP Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 71 | 72 |
SERP Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 85 | 216 |
SERP Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 222 | 82 |
SERP Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 40 | 16 |
SERP Benefits | Interest and dividend income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets |  | 1 |
Level 1 | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 2,303 | 2,346 |
Level 1 | Pension Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 923 | 962 |
Level 1 | Pension Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 104 | 124 |
Level 1 | Pension Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 106 | 129 |
Level 1 | Pension Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 73 | 105 |
Level 1 | Pension Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 193 | 202 |
Level 1 | Pension Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 273 | 526 |
Level 1 | Pension Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 572 | 205 |
Level 1 | Pension Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 59 | 93 |
Level 1 | SERP Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 848 | 878 |
Level 1 | SERP Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 327 | 360 |
Level 1 | SERP Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 38 | 23 |
Level 1 | SERP Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 38 | 72 |
Level 1 | SERP Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 27 | 37 |
Level 1 | SERP Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 71 | 72 |
Level 1 | SERP Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 85 | 216 |
Level 1 | SERP Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 222 | 82 |
Level 1 | SERP Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 40 | 16 |
Level 2 | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | Pension Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 2 | SERP Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | Pension Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Equity securities - US large cap common stocks |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Equity securities - US mid cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Equity securities - US small cap stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Equity securities - emerging markets stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Equity securities - international stock mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Debt securities - intermediate term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Debt securities - short term bond mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | 0 | 0 |
Level 3 | SERP Benefits | Cash - money market account |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan assets | $ 0 | $ 0 |

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