Subsequent Events - Additional Information (Detail)	Aug. 01, 2017 USD ($)	Jul. 31, 2017 USD ($)	Jul. 21, 2017 USD ($)	Jul. 20, 2017 USD ($)	Jul. 13, 2017 USD ($)	Jun. 30, 2017 USD ($)
Subsequent Event [Line Items]
Amount approved under share purchase program						$ 20,000,000
Subsequent Event
Subsequent Event [Line Items]
Amount approved under share purchase program					$ 15,000,000
Subsequent Event | 2013 Credit Facility
Subsequent Event [Line Items]
Additional restricted payments allowed for each anniversary of effective date of amendment under credit facility	$ 20,000,000
Net leverage ratio upper limit	5.5
Net leverage ratio lower limit	1
Subsequent Event | Maximum
Subsequent Event [Line Items]
Stock repurchase program terminated, amount					$ 20,000,000
Subsequent Event | Maximum | 2013 Credit Facility
Subsequent Event [Line Items]
Restricted payments allowed under credit facility	$ 40,000,000
Subsequent Event | KMIR-TV and KPSE-LD | OTA Broadcasting (PSP), LLC
Subsequent Event [Line Items]
Payment to acquire television stations				$ 21,000,000
Business acquisition description of acquired entity				the Company entered into an agreement with OTA Broadcasting (PSP), LLC to acquire television stations KMIR-TV, the local NBC affiliate, and KPSE-LD, the local MyNetworkTV affiliate, serving the Palm Springs, California area
FCC | Subsequent Event
Subsequent Event [Line Items]
Proceeds from the reverse auction for broadcast spectrum			$ 263,600,000
FCC | Subsequent Event | WJAL-TV
Subsequent Event [Line Items]
Initial payment for relocation of television station		$ 16,300,000
Additional payment upon completion of the relocation		$ 16,300,000