Commitments and Contingencies (Details)			1 Months Ended	3 Months Ended		49 Months Ended
	Apr. 13, 2017 USD ($)	Dec. 08, 2008 subsidiary	Feb. 29, 2012 USD ($)	Mar. 31, 2017 USD ($) claim	Mar. 31, 2016 USD ($)	Dec. 31, 2012 claim	May 10, 2017 radio_station television_station	Dec. 31, 2016 USD ($)	Aug. 12, 2016 case
Loss Contingencies [Line Items]
Number of direct and indirect wholly-owned subsidiaries included in bankruptcy filing | subsidiary		110
Number of proofs of claim settled or satisfied pursuant to the terms of the plan | case									106
Number of complaints filed | claim						7,400
Restricted cash and cash equivalents				$ 17,566,000				$ 17,566,000
Number of proofs of claim subject to further evaluation and adjustments | claim				403
Reorganization Items				$ (250,000)	$ (434,000)
FCC regulation, maximum reimbursement amount for required product modifications			$ 1,750,000,000
Subsequent Event
Loss Contingencies [Line Items]
FCC regulation, number of television stations authorized | television_station							39
FCC regulation, number of radio stations authorized | radio_station							1
Expected Proceeds from FCC Spectrum Auction	$ 190,000,000
Number of Stations Subject to Spectrum Frequency Transition	22