Fair Value Measurement Disclosures - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2017
Interest Rate Swap
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Gain offset by an intra-period allocation of income tax expense		$ 85,000
FCC Broadcasting License
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Impairment of intangible asset		0	$ 900,000
FCC Broadcasting License | Level 3 Non-Reoccurring Fair Value Measure
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Impairment of intangible asset	$ 900,000	$ 0
FCC Broadcasting License | Level 3 Non-Reoccurring Fair Value Measure | Discounted Cash Flow Method
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Revenue growth rates	1.50%
Market revenue shares at maturity	3.90%
Operating income margins at maturity	33.40%
Discount rate	10.00%
12.5% Senior Secured Notes Due 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Notes trading percentage		100.19%
12.5% Senior Secured Notes Due 2017 | Subsequent Event
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Notes trading percentage				100.04%