COMMON STOCK (Details)			1 Months Ended									12 Months Ended
	Mar. 15, 2017 USD ($) $ / shares shares	Sep. 06, 2016 USD ($)	Feb. 28, 2018 $ / shares	Nov. 30, 2017 $ / shares	Aug. 31, 2017 $ / shares	May 31, 2017 $ / shares	Feb. 28, 2017 $ / shares	Nov. 30, 2016 $ / shares	Aug. 31, 2016 $ / shares	May 31, 2016 $ / shares	Feb. 28, 2015 $ / shares	Dec. 31, 2017 USD ($) vote $ / shares shares	Dec. 31, 2016 $ / shares shares	Dec. 31, 2015 $ / shares	Aug. 30, 2016	Mar. 20, 2014 USD ($)
Common Stock
Quarterly dividend declared (in dollars per share) | $ / shares				$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.165	$ 0.72	$ 0.71	$ 0.66
Dividend paid (in dollars per share) | $ / shares												$ 0.72	$ 0.705
Share repurchase program, authorized amount																$ 150,000,000
Additional authorized repurchase amount		$ 150,000,000
Subsequent Event
Common Stock
Quarterly dividend declared (in dollars per share) | $ / shares			$ 0.18
Class A Common Stock
Common Stock
Number of votes holders of common stock are entitled for each share held | vote												1
Number of shares repurchased (in shares) | shares												1,000,000
Value of shares repurchased, gross												$ 30,300,000
Total remaining authorization amount												$ 88,800,000
Class B Common Stock
Common Stock
Number of votes holders of common stock are entitled for each share held | vote												10
Number of Class B shares converted into Class A Common stock | shares												0	257,673
Senior Notes | 6.125% Senior Unsecured Notes due 2022
Common Stock
Interest rate (as a percent)												6.125%	6.125%
Senior Notes | 5.875% Senior Unsecured Notes due 2026
Common Stock
Interest rate (as a percent)												5.875%	5.875%
Senior Notes | 5.375% Senior Unsecured Notes due 2021
Common Stock
Interest rate (as a percent)												5.375%	5.375%
Senior Notes | 5.125% Senior Unsecured Notes due 2027
Common Stock
Interest rate (as a percent)												5.125%	5.125%		5.125%
Senior Notes | 5.625% Senior Unsecured Notes. due 2024
Common Stock
Interest rate (as a percent)													5.625%
Bank Credit Agreement | First Lien Indebtedness Ratio, 3.75 | Maximum
Common Stock
Unrestricted cash first lien indebtedness ratio												3.75
Bank Credit Agreement | First Lien Indebtedness Ratio, 3.75-4.25
Common Stock
Unrestricted cash first lien indebtedness ratio												4.25
Amount of unrestricted annual cash payments (up to)												$ 200,000,000
Amount of unrestricted annual cash payments to be carry over to next year												50,000,000
Additional aggregate basket (up to)												250,000,000
Aggregate basket as long as no Event												$ 50,000,000
Public Offering | Class A Common Stock
Common Stock
Number of shares issued in public offering (in shares) | shares	12,000,000
Price per share in public offering (in dollars per share) | $ / shares	$ 42.00
Net proceeds from public offering	$ 0