Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Cash Flows Supplemental Disclosures (Non-cash investing and financing activities) (Details)

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Consolidated Statements of Cash Flows Supplemental Disclosures (Non-cash investing and financing activities) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]    
Non-cash consideration for Wireless Acquisition $ 23,326 $ 0
Non-cash additions for purchases of property and equipment 17,683 36,805
Asset retirement obligation additions to property and equipment 1,730 382
Net capital lease obligation 0 9,386
Distribution to non-controlling interest 0 4,167
Deferred compensation distribution denominated in shares $ 0 $ 617