STOCKHOLDERS’ EQUITY - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) shares	Sep. 30, 2017 USD ($) vote shares	Sep. 30, 2016 USD ($) shares	Sep. 18, 2017 USD ($)
Class of Stock [Line Items]
Repurchase of common stock			$ 4,098,000
Class A Common Stock
Class of Stock [Line Items]
Voting rights per share | vote			1
Authorized amount for Stock Repurchase Program					$ 100,000,000
Repurchase of common stock (in shares) | shares	195,824	247,366	195,824	1,918,999
Repurchase of common stock	$ 4,100,000	$ 3,800,000	$ 4,100,000	$ 28,500,000
Remaining amount authorized for repurchase	$ 95,900,000		$ 95,900,000
Class B Common Stock
Class of Stock [Line Items]
Voting rights per share | vote			1