Annual report pursuant to Section 13 and 15(d)

Intangible Assets and Goodwill (Finite Lived) (Details)

v3.6.0.2
Intangible Assets and Goodwill (Finite Lived) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 128,267 $ 111,011  
Less accumulated amortization 53,823 41,721  
Net other intangible assets 74,444 69,290 $ 66,015
Software License Fee      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 80,839 63,760  
Rights to Use      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 45,114 44,937  
Customer Relationships      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 1,530 1,530  
Right Of Way      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 784 $ 784