Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Consolidated Statement of Cash Flows Supplemental Disclosures ( Non-cash investing and financing activities) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]      
Non-cash additions for purchases of property and equipment $ 17,230 $ 9,010 $ 7,233
Asset retirement obligation additions to property and equipment 5,292 660 613
Deferred compensation distribution denominated in shares 621 511 0
Net assets acquired with equity in AWN $ 267,642 $ 0 $ 0