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Investments (Schedule of Fair Value of Equity Investments Trading) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | $ 873,268 | $ 546,016
Financials |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 125,395 | 146,615
Communications and technology |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 74,567 | 82,444
Consumer |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 48,634 | 51,083
Industrial, utilities and energy |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 29,028 | 26,645
Healthcare |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 28,135 | 28,796
Basic materials |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 4,915 | 5,092
Equity exchange traded funds |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 107,814 | 114,919
Fixed income exchange traded funds |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | $ 454,780 | $ 90,422

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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
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