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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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- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. + References 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) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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