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Subsequent Events (Details Textual) (USD $)
In Thousands, except Share data in Millions, unless otherwise specified
3 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jul. 25, 2014
Subsequent Events
Jul. 31, 2014
Subsequent Events
Jul. 31, 2014
Subsequent Events
One-time Cash Payment
Jul. 31, 2014
Subsequent Events
First Extension Option
Jul. 31, 2014
Subsequent Events
Second Extension Option
Jul. 25, 2014
Comcast
Subsequent Events
Jul. 25, 2014
Migration of Comcast Current Residential Customer Accounts
Subsequent Events
Jul. 25, 2014
Migration of Comcast Acquired Additional Residential Customer Accounts
Subsequent Events
Subsequent Event [Line Items]                        
Restructuring charges $ 39 $ (38) $ 1,257 $ 863     $ 8,000          
Comcast amendment agreement effective date           Jul. 01, 2014            
Comcast amendment agreement initial term           5 years            
Comcast amendment agreement date of extend option               Jan. 01, 2019 Jan. 01, 2020      
Issuance of stock warrants                   2.9 1.9 1.0
Stock warrants term         10 years              
Stock warrants, exercise price         $ 26.68