INTANGIBLE ASSETS AND GOODWILL (Details) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2019	Sep. 30, 2018	Apr. 01, 2018	Dec. 30, 2018
Intangible assets subject to amortization, gross
Balance at the beginning of the period	$ 838,336,000
Balance at the end of the period	838,336,000			$ 838,336,000
Accumulated amortization
Balance at the beginning of the period	(807,725,000)
Amortization Expense	(11,801,000)		$ (12,036,000)
Balance at the end of the period	(819,526,000)			(807,725,000)
Intangible assets subject to amortization, net
Balance at the beginning of the period	30,611,000
Amortization Expense	(11,801,000)		(12,036,000)
Balance at the end of the period	18,810,000			30,611,000
Mastheads
Balance at the beginning of the period	112,736,000
Impairment Charges	0	$ (14,100,000)	0	(37,200,000)
Balance at the end of the period	112,736,000			112,736,000
Goodwill [Roll Forward]
Balance at the beginning of the period	705,174,000
Goodwill impairment charge	0		0
Balance at the end of the period	705,174,000			705,174,000
Total
Balance at the beginning of the period	848,521,000
Amortization Expense	(11,801,000)		$ (12,036,000)
Balance at the end of the period	$ 836,720,000			$ 848,521,000