Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Business Acquisition) (Details)

v2.4.0.8
Business and Summary of Significant Accounting Principles (Business Acquisition) (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 9 Months Ended
Jul. 22, 2013
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Business Acquisition [Line Items]        
Purchase of business $ 100,000 $ 100,000 $ 0  
Purchase price allocation:        
Goodwill   215,384   77,294
ACS [Member]
       
Business Acquisition [Line Items]        
Purchase of business 100,000      
Fair value of the one-third ownership interest of AWN 272,198      
Business Combination, Consideration Transferred 372,198      
Purchase price allocation:        
Current assets 17,132      
Property and equipment, including construction in progress 82,865      
Goodwill 138,090      
Other assets 74,523      
Fair value of liabilities assumed (6,012)      
Total fair value of assets acquired and liabilities assumed 372,198      
ACS [Member] | Wireless Licenses [Member]
       
Purchase price allocation:        
Wireless licenses $ 65,600