BUSINESS AND BASIS OF ACCOUNTING (Details)		1 Months Ended	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 09, 2019	Nov. 30, 2019	Sep. 29, 2019 USD ($) company item	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Sep. 29, 2019 USD ($) company item	Sep. 30, 2018 USD ($)	Dec. 30, 2018 USD ($)	Dec. 27, 2020 USD ($)	Dec. 31, 2017 USD ($)
Investments in Unconsolidated Companies Activity
Number of media companies | company			30						30
Number of states | item			14						14
Length of fiscal quarter			91 days						273 days
Net loss			$ (304,703,000)	$ (17,531,000)	$ (41,956,000)	$ 7,038,000	$ (20,365,000)	$ (38,941,000)	$ (364,190,000)	$ (52,268,000)
Working capital			152,800,000						152,800,000
Minimum required contributions			108,700,000						108,700,000
Duration to become compliant	18 months
Stockholders' deficit			(671,536,000)	$ (372,523,000)	$ (360,651,000)	$ (241,224,000)	$ (254,517,000)	$ (239,957,000)	(671,536,000)	$ (241,224,000)	$ (341,665,000)		$ (204,332,000)
Number of recent fiscal years											4
Total assets and revenues required to be compliant			50,000,000						$ 50,000,000
Minimum years in compliance									2 years
Total duration of assets and revenues compliance requirement									3 years
Market value of publicly held shares			$ 15,000,000						$ 15,000,000
Forecast
Investments in Unconsolidated Companies Activity
Estimated minimum required contributions												$ 124,200,000
Waiver request duration		3 years