Ownership Interests in and Advances to Partner Companies and Funds - Schedule of Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments in and Advances to Affiliates [Abstract]
Revenue	$ 28,940	$ 42,396	$ 112,540	$ 241,023
Gross profit	14,448	23,624	61,401	157,952
Net loss	$ (30,470)	$ (35,063)	$ (99,282)	$ (121,440)

The amount of net income (loss) reported by an equity method investment of the entity.

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