INVESTMENTS (Major Categories of Investment Gains and Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Gain (Loss) on Securities [Line Items]
Investment gains	$ 1,623	$ 3,055
Gains on trading securities	13	5
Other-than-temporary impairments	180	0
Realized gains on fixed maturities
Gain (Loss) on Securities [Line Items]
Investment gains	1,361	18
Change in fair value of equity securities
Gain (Loss) on Securities [Line Items]
Investment gains	(344)	712
Change in surrender value of company owned life insurance
Gain (Loss) on Securities [Line Items]
Investment gains	343	295
Realized gain on company owned life insurance
Gain (Loss) on Securities [Line Items]
Investment gains	0	1,792
Other gains principally real estate
Gain (Loss) on Securities [Line Items]
Investment gains	4	0
Equity securities
Gain (Loss) on Securities [Line Items]
Investment gains	$ 426	$ 233

Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27476-111563

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Amount of realized and unrealized gain (loss) on investment.

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-Topic 320
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
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