Goodwill, Other Intangible Assets And Liabilities - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Dec. 27, 2013	Dec. 31, 2012
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Unfavorable broadcast rights contracts	$ 209	$ 80,649
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, remainder of 2016	50,000
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, 2017	198,000
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, 2018	197,000
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, 2019	169,000
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, 2020	161,000
Amortization expense relating to amortizable intangible assets, excluding lease contract intangible assets, 2021	127,000
Local TV Acquisition
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Intangible liabilities related to contracts for broadcast rights programming, Local TV Acquisition			$ 9,000
Fresh-Start Adjustments
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Unfavorable contract intangible liability				$ 227,000
Broadcast rights intangible liabilities
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Unfavorable broadcast rights contracts	$ 0	$ 80,440
Broadcast rights intangible liabilities | Fresh-Start Adjustments
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Unfavorable broadcast rights contracts				$ 226,000