Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Detail) - shares	1 Months Ended	12 Months Ended
	May 31, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Beginning balance		93,843,847	58,388,808	29,602,884
Issuance of class A common stock	25,875,000	1,070	34,780,622	28,275,006
Issuance of restricted class A common stock, net		836,867	651,815	490,381
Issuance of deferred stock units		27,506	22,602	20,537
Ending balance		94,709,290	93,843,847	58,388,808