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