SUBSEQUENT EVENTS (Details) $ in Thousands	Jul. 16, 2018 USD ($)	Jul. 13, 2018	Jul. 01, 2018 USD ($)	Dec. 31, 2017
Lessor of
Long-term debt			$ 709,519
9.00% senior secured notes due in 2022
Subsequent Events
Interest rate (as a percent)			9.00%	9.00%
Lessor of
Long-term debt			$ 344,101
6.875% unsecured debentures due in 2029
Subsequent Events
Interest rate (as a percent)			6.875%	6.875%
Lessor of
Long-term debt			$ 276,230
7.150% unsecured debentures due in 2027
Subsequent Events
Interest rate (as a percent)			7.15%	7.15%
Lessor of
Long-term debt			$ 89,188
Subsequent event
Lessor of
Long-term debt	$ 760,418
Subsequent event | ABL Credit Agreement
Subsequent Events
Maximum borrowing capacity	$ 46,400
Percentage of Eligible Advertising Accounts	85.00%
Percentage of Eligible Unbilled Advertising Accounts Receivable	80.00%
Lessor of
Value of unbilled advertising accounts receivable	$ 3,000
Book value of eligible inventory	$ 6,000
Book value of eligible inventory (as a percent)	50.00%
Amount borrowed	$ 10,000
Remaining borrowing capacity	36,400
Long-term debt	$ 10,000
Subsequent event | ABL Credit Agreement | Revolving credit facility
Subsequent Events
Minimum percentage of loan amount maintain	12.50%
Maximum borrowing capacity	$ 65,000
Lessor of
Minimum amount of debt maintain	$ 8,100
Minimum fixed charge coverage ratio	1.10
Number of threshold consecutive days	30 days
Subsequent event | ABL Credit Agreement | Letter of credit
Subsequent Events
Maximum borrowing capacity	$ 35,000
Subsequent event | ABL Credit Agreement | Maximum
Lessor of
Interest payable period	3 months
Subsequent event | Junior Lien Term Loan Credit Agreement
Lessor of
Principal amount of debt (as a percent)	100.00%
Subsequent event | Junior Lien Term Loan Credit Agreement | Tranche A
Subsequent Events
Interest rate (as a percent)	7.795%
Maximum borrowing capacity	$ 157,100
Subsequent event | Junior Lien Term Loan Credit Agreement | Tranche B
Subsequent Events
Interest rate (as a percent)	6.875%
Maximum borrowing capacity	$ 193,500
Subsequent event | LIBOR | ABL Credit Agreement
Lessor of
Basis spread on variable rate (as a percent)	1.00%
Subsequent event | LIBOR | ABL Credit Agreement | Minimum
Lessor of
Basis spread on variable rate (as a percent)	1.75%
Subsequent event | LIBOR | ABL Credit Agreement | Maximum
Lessor of
Basis spread on variable rate (as a percent)	2.25%
Subsequent event | Federal funds rate | ABL Credit Agreement
Lessor of
Basis spread on variable rate (as a percent)	0.50%
Subsequent event | Base rate | ABL Credit Agreement | Minimum
Lessor of
Basis spread on variable rate (as a percent)	0.75%
Subsequent event | Base rate | ABL Credit Agreement | Maximum
Lessor of
Basis spread on variable rate (as a percent)	1.25%
Subsequent event | 9.00% senior secured notes due in 2022 | Junior Lien Term Loan Credit Agreement
Lessor of
Repayments of long-term debt	$ 193,500
Subsequent event | 6.875% unsecured debentures due in 2029
Subsequent Events
Interest rate (as a percent)	6.875%	6.875%
Lessor of
Long-term debt	$ 82,764
Subsequent event | 6.875% unsecured debentures due in 2029 | Junior Lien Term Loan Credit Agreement | Tranche B
Lessor of
Debt conversion amount	$ 75,000
Subsequent event | 7.150% unsecured debentures due in 2027
Subsequent Events
Interest rate (as a percent)	7.15%	7.15%
Lessor of
Long-term debt	$ 7,105
Subsequent event | 7.150% unsecured debentures due in 2027 | Junior Lien Term Loan Credit Agreement
Lessor of
Repayments of long-term debt	$ 82,100
Subsequent event | 9.00% senior secured notes due in 2026
Subsequent Events
Interest rate (as a percent)	9.00%
Repurchase price (as percent)	101.00%
Minimum percentage of loan amount maintain	25.00%
Lessor of
Long-term debt	$ 310,000
Subsequent event | 9.00% senior secured notes due in 2026 | Private Placement
Subsequent Events
Interest rate (as a percent)	9.00%
Aggregate principal amount of notes issued	$ 310,000