Annual report pursuant to Section 13 and 15(d)

Description of Business (Details)

v3.6.0.2
Description of Business (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Feb. 14, 2014
USD ($)
Dec. 31, 2015
customer
Dec. 31, 2014
USD ($)
Dec. 31, 2016
customer
Skyhook | Skyhook          
Business Acquisition [Line Items]          
Voting interest acquired (as a percent)   100.00%      
Cash paid for acquisition | $   $ 57,500      
Skyhook | Skyhook | Selling, general and administrative          
Business Acquisition [Line Items]          
Acquisition related costs | $       $ 958  
Charter          
Business Acquisition [Line Items]          
Number of business and residential customers | customer         26,200,000
Customer concentration | Revenue | Skyhook          
Business Acquisition [Line Items]          
Number of major customers | customer     1    
Customer concentration | Revenue | Significant customer | Skyhook          
Business Acquisition [Line Items]          
Concentration risk percentage 85.00%     83.00%  
Customer concentration | Revenue | Significant customer | Skyhook | Customer relationships | Minimum          
Business Acquisition [Line Items]          
Concentration risk percentage 80.00%        
Customer concentration | Revenue | Significant customer | Skyhook | Customer relationships | Maximum          
Business Acquisition [Line Items]          
Concentration risk percentage 90.00%