COMMITMENTS AND CONTINGENCIES Programming Rights Agreements and Other Commitments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 2,830
Operating Leases, Future Minimum Payments, Due in Two Years		761
Operating Leases, Future Minimum Payments Due		6,385
Rent expense		8,100	$ 7,000	$ 5,800
Operating Leases, Future Minimum Payments, Due in Three Years		371
Operating Leases, Future Minimum Payments, Due in Four Years		349
Operating Leases, Future Minimum Payments, Due in Five Years		346
Operating Leases, Future Minimum Payments, Due Thereafter		1,728
Machinery and Equipment [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months		1,273
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two		0
Total commitments		1,273
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three		0
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four		0
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five		0
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five		0
Purchase Commitment [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months		33,308
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two		28,700
Total commitments		99,140	$ 114,300
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three		17,910
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four		13,077
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five		2,587
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five		3,558
Transmission Service Agreement [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	[1]	14,983
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	[1]	11,827
Total commitments	[1]	29,152
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	[1]	2,030
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	[1]	161
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	[1]	139
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	[1]	$ 12

[1] (1) Other commitments are primarily comprised of digital transmission commitments.