Annual report pursuant to Section 13 and 15(d)

Intangible Assets and Goodwill (Finite Lived) (Details)

v2.4.1.9
Intangible Assets and Goodwill (Finite Lived) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 104,975us-gaap_FiniteLivedIntangibleAssetsGross $ 101,030us-gaap_FiniteLivedIntangibleAssetsGross  
Less accumulated amortization 38,960us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization 29,595us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Net other intangible assets 66,015us-gaap_FiniteLivedIntangibleAssetsNet 71,435us-gaap_FiniteLivedIntangibleAssetsNet 16,560us-gaap_FiniteLivedIntangibleAssetsNet
Software License Fee      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 52,683us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
41,804us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
 
Rights to Use      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 48,283us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ContractualRightsMember
55,407us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ContractualRightsMember
 
Customer Relationships      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 3,226us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
3,036us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Right Of Way      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 783us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember
$ 783us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember