COMMITMENTS AND CONTINGENCIES Programming Rights Agreements and Other Commitments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 2,732
Operating Leases, Future Minimum Payments, Due in Two Years		2,532
Operating Leases, Future Minimum Payments Due		12,478
Rent expense		9,300	$ 9,000	$ 7,800
Operating Leases, Future Minimum Payments, Due in Three Years		1,970
Operating Leases, Future Minimum Payments, Due in Four Years		1,305
Operating Leases, Future Minimum Payments, Due in Five Years		1,188
Operating Leases, Future Minimum Payments, Due Thereafter		2,751
Machinery and Equipment [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months		503
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two		0
Total commitments		503
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		23,574
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two		18,647
Total commitments		62,774	$ 108,800
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three		13,157
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four		5,313
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five		403
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five		1,680
Transmission Service Agreement [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	[1]	12,614
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	[1]	8,316
Total commitments	[1]	29,452
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	[1]	2,678
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	[1]	2,758
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	[1]	3,086
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	[1]	$ 0

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