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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES : Trading Securities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Equity securities - cost	$ 51,729		$ 36,851
Available-for-sale Securities, Gross Unrealized Gain	139,341		74,099
Available-for-sale Securities, Gross Unrealized Loss	(10,750)		(1,847)
Equity securities at fair value	180,320		109,103
Equity Securites - LF Fund Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	138,241
Available-for-sale Securities, Gross Unrealized Loss	(10,198)
Equity securities - other equity [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Equity securities - cost	11,676		4,086
Available-for-sale Securities, Gross Unrealized Gain	1,100		1,410
Available-for-sale Securities, Gross Unrealized Loss	(552)		(1,264)
Equity securities at fair value	12,224		4,232
Equity Securites - LF Fund Public Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Equity securities - cost	40,053		32,765
Available-for-sale Securities, Gross Unrealized Gain		$ 72,689
Available-for-sale Securities, Gross Unrealized Loss		$ (583)
Equity securities at fair value	$ 168,096		$ 104,871

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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Fair value portion of investments accounted under the equity method.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=125513658&loc=d3e32014-111567

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