Tax Receivable Agreement Liability - Narrative (Details) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Income Tax Disclosure [Abstract]
Reduction in federal, state, local and non-US income taxes (in percentage)	90.00%
Liability for tax receivable agreement	$ 203.8

Tax Receivable Agreement, Federal, State, Local and Non-US Income Taxes, Percent

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