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Investments (Schedule of Fair Value of Equity Investments Trading) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
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

X

- 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

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- Definition

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+ References

No definition available.

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