Segment Data - 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
Segment Reporting Information [Line Items]
Total assets	$ 528,188				$ 527,767				$ 528,188	$ 527,767	$ 538,237
Net revenue	65,432	$ 69,261	$ 59,891	$ 59,550	65,262	$ 62,274	$ 61,846	$ 52,656	254,134	242,038	$ 223,916
Mexico
Segment Reporting Information [Line Items]
Total assets	$ 8,800				$ 9,000				8,800	$ 9,000
Television | Television Station Channel Modification
Segment Reporting Information [Line Items]
Net revenue									$ 10,500