Goodwill and other Intangible Assets Schedule of Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Schedule of Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 3,650,000
Mastheads	21,883,000	$ 21,883,000
Other intangible assets, net	115,005,000	119,819,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	16,192,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two	15,929,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	13,289,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	12,384,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	11,704,000
Customer Lists [Member]
Schedule of Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	696,632,000	692,886,000
Finite-Lived Intangible Assets, Accumulated Amortization	603,510,000	594,950,000
Finite-Lived Intangible Assets, Net	$ 93,122,000	$ 97,936,000