LONG-TERM DEBT (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 1,005,122	$ 1,021,622
Less: current portion of long-term debt	(3,500)	(3,500)
Less: original issue discount and issuance costs	(14,317)	(15,386)
Long-term debt, net	987,305	1,002,736
2015 Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	0	344,750
2017 Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	348,250	0
9.25% Senior Subordinated Notes due February 2020 [Member]
Debt Instrument [Line Items]
Total debt	295,000	315,000
7.375% Senior Secured Notes due April 2022 [Member]
Debt Instrument [Line Items]
Total debt	350,000	350,000
Comcast Note due April 2019 [Member]
Debt Instrument [Line Items]
Total debt	$ 11,872	$ 11,872