INVESTMENTS (Net Realized Gains (Losses) by Major Investment Category (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Gross realized and unrealized gains:
Total gross realized and unrealized gains	$ 865	$ 1,705
Gross realized and unrealized losses:
Total gross realized and unrealized losses	(773)	(4,530)
Net realized and unrealized gains (losses) on investments	92	(2,825)
Debt Securities
Gross realized and unrealized gains:
Debt securities	864	1,386
Gross realized and unrealized losses:
Debt securities	(720)	(148)
Equity Securities
Gross realized and unrealized gains:
Equity securities	1	319
Gross realized and unrealized losses:
Equity securities	$ (53)	$ (4,382)

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27405-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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