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Investments (Schedule of Fair Value of Equity Investments Trading) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Equity investments trading	$ 436,931	$ 310,252
Financials
Investment [Line Items]
Equity investments trading	248,189	200,357
Communications and technology
Investment [Line Items]
Equity investments trading	79,206	42,333
Industrial, utilities and energy
Investment [Line Items]
Equity investments trading	38,583	24,520
Consumer
Investment [Line Items]
Equity investments trading	35,987	20,639
Healthcare
Investment [Line Items]
Equity investments trading	29,510	18,925
Basic materials
Investment [Line Items]
Equity investments trading	$ 5,456	$ 3,478

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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).

+ 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=99377092&loc=SL75136599-209740

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