Noncontrolling Interest - Summary of Activity for Equity Attributable to Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018	$ 491,852
Net loss attributable to noncontrolling interest	(21,239)	$ 6,870
March 31, 2019	470,712
Bold Transaction
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018	491,852
EEH Units and Class B Common Stock converted to Class A Common Stock	0
ASC 842 implementation adjustment attributable to noncontrolling interest	99
Net loss attributable to noncontrolling interest	(21,239)
March 31, 2019	$ 470,712

Noncontrolling Interest, Adjustment For New Accounting Pronouncements

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

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- Definition

Amount of increase in noncontrolling interest from a business combination.

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