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v3.19.3.a.u2

Fair Value Measurements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Investment [Line Items] |  |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount | $ 0 | $ 0 |
Private common equity securities | 3,000 |  |
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount | 0 | 0 |
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount | 0 | 0 |
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) | 0 | 0 | $ 9,500
Equity Securities [Member] |  |  |
Investment [Line Items] |  |  |
Trading Securities, Change in Unrealized Holding Gain (Loss) | 0 | 0 | 330,400
Total debt securities |  |  |
Investment [Line Items] |  |  |
Trading Securities, Change in Unrealized Holding Gain (Loss) | $ 10,000 | $ (6,700) | $ (12,400)

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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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