Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Line Items]
Estimated losses for bad debts									$ 500	$ 400	$ (200)
Bad debts actually charged off									600	900	1,100
Long term debt fair value	$ 316,600				$ 340,300				$ 316,600	340,300
Percentage of tax benefit recognized									50.00%
Advertising expense									$ 500	500	300
Retransmission consent revenue									27,900	26,400	22,200
Net revenue	$ 65,432	$ 69,261	$ 59,891	$ 59,550	$ 65,262	$ 62,274	$ 61,846	$ 52,656	254,134	242,038	223,916
Broadcast trade cost									$ 500	$ 500	$ 500
Shares of dilutive securities not included in computation of diluted earnings per share									299,143	1,116,750	5,670,908
Comprehensive income (loss)									$ (1,977)	$ (2,372)	$ 234
Broadcast Equipment
Accounting Policies [Line Items]
Net revenue									$ 500	$ 500	$ 500
Univision
Accounting Policies [Line Items]
Period to grant television station for terms of retransmission consent agreements									6 years
Retransmission consent agreements expiring date									Dec. 31, 2014
Retransmission consent agreements extended expiration date									Mar. 31, 2016
Interest Rate Swap Agreements
Accounting Policies [Line Items]
Term loan beginning date									Dec. 31, 2015