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Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	$ 157,731	$ 74,280
Marketable Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	143,505	59,844
Equity Investments
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	14,226	14,436
Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	12,257	14,328
Level 1 | Equity Investments
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	12,257	14,328
Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	143,505	59,844
Level 2 | Marketable Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	143,505	59,844
Level 3
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	1,969	108
Level 3 | Equity Investments
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	$ 1,969	$ 108

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

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+ References

No definition available.

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