2.4.0.83080 - Disclosure - Asset Retirement Obligations (Tables)truefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001441849duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_AssetRetirementObligationDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Asset Retirement Obligations2false 2us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;"> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Changes in the carrying amount of our AROs were as follows (in thousands):</font></p> <p style="MARGIN: 0in 0in 0pt;">&#160;</p> <table style="text-align:left;TEXT-ALIGN: left; WIDTH: 554px; BORDER-COLLAPSE: collapse; 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