STOCKHOLDERS’ EQUITY - Components and Voting Power of Outstanding Common Stock (Detail) - shares	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Shares Outstanding	119,556,426
Percentage	100.00%
Class A Common Stock
Class of Stock [Line Items]
Shares Outstanding	72,307,299	30,486,858
Percentage	60.50%
Class B Common Stock
Class of Stock [Line Items]
Shares Outstanding	47,249,127	88,942,052
Percentage	39.50%