Equity - Narrative (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Class of Stock [Line Items]
Gross proceeds from sale of shares | $	$ 621.8
Common shares | Class A common shares
Class of Stock [Line Items]
Issuance of common shares (in shares) | shares	29,610,854
Common shares issued (in dollars per share) | $ / shares	$ 21.00
QIA
Class of Stock [Line Items]
Interest held by QIA (as a percent)	9.90%
QIA | Common shares | Class A common shares
Class of Stock [Line Items]
Interest held by QIA (as a percent)	19.40%