Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Recent Transactions - Total acquisition consideration allocated (Detail)

v3.10.0.1
Acquisitions and Recent Transactions - Total acquisition consideration allocated (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Assets      
Property and equipment $ 1,086    
Broadcast licenses 6,281    
Goodwill 26,789 $ 26,424 $ 25,613
Customer lists and contracts 1,882    
Domain and brand names 1,252    
Subscriber base and lists 875    
Non-compete agreements 19    
Other amortizable intangible assets 334    
Net assets acquired 12,722    
Liabilities      
Contract liabilities, long-term (1,542)    
Total purchase price consideration 11,180    
Broadcast [Member]      
Assets      
Property and equipment 371    
Broadcast licenses 6,281    
Goodwill 7    
Net assets acquired 6,659    
Liabilities      
Total purchase price consideration 6,659    
Digital Media [Member]      
Assets      
Property and equipment 715    
Goodwill 986    
Customer lists and contracts 1,882    
Domain and brand names 1,252    
Subscriber base and lists 875    
Non-compete agreements 19    
Other amortizable intangible assets 334    
Net assets acquired 6,063    
Liabilities      
Contract liabilities, long-term (1,542)    
Total purchase price consideration $ 4,521