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Note 11 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Recurring [Member] |  |
Marketable equity securities | $ 556,791 | $ 9,353
Marketable equity securities | 556,791 | 9,353
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Marketable equity securities | 556,791 | 9,353
Marketable equity securities | 556,791 | 9,353
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable equity securities | 0 |
Marketable equity securities | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Marketable equity securities |  | 0
Marketable equity securities |  | 0
Fair Value, Nonrecurring [Member] |  |
Real estate | 5,300 | 39,510
Other real estate investments |  | 32,974
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Real estate | 0 | 0
Other real estate investments |  | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Real estate | 0 | 0
Other real estate investments |  | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Real estate | $ 5,300 | 39,510
Other real estate investments |  | $ 32,974

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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