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Shareholders' Equity and Noncontrolling Interest - Class A Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	May 25, 2017	May 04, 2017
Subscription Agreements | Common Stock Class A
Class of Stock [Line Items]
Shares issued in transaction (in shares)		23,500,000
Sale of stock price per share (in usd per share)		$ 14.50
Gross proceeds		$ 340.8
Conversion of Class B Preferred Stock to Class A Common Stock | Common Stock Class A
Class of Stock [Line Items]
Conversion of class b preferred to class a common (in shares)	26,100,000
Conversion of Class B Preferred Stock to Class A Common Stock | Preferred Class B
Class of Stock [Line Items]
Conversion of class b preferred to class a common (in shares)	104,400

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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