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Investments (Schedule of Fair Value of Equity Investments Trading) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Equity investments trading	$ 546,016	$ 702,617
Financials
Schedule of Investments [Line Items]
Equity investments trading	146,615	452,765
Communications and technology
Schedule of Investments [Line Items]
Equity investments trading	82,444	119,592
Consumer
Schedule of Investments [Line Items]
Equity investments trading	51,083	44,477
Industrial, utilities and energy
Schedule of Investments [Line Items]
Equity investments trading	26,645	43,380
Healthcare
Schedule of Investments [Line Items]
Equity investments trading	28,796	35,140
Basic materials
Schedule of Investments [Line Items]
Equity investments trading	5,092	7,263
Equity exchange traded funds
Schedule of Investments [Line Items]
Equity investments trading	114,919	0
Fixed income exchange traded funds
Schedule of Investments [Line Items]
Equity investments trading	$ 90,422	$ 0

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

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