XML 131 R90.htm IDEA: XBRL DOCUMENT v2.4.0.8
Impairment - Additional Information (Details) (USD $)
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Gas Treating Plants and CO2 Compression Facilities
Dec. 31, 2013
Gas Treating Plants and other Midstream Assets
Jun. 30, 2013
Gas Treating Plants and other Midstream Assets
Dec. 31, 2013
Gas Treating Plants and other Midstream Assets
Dec. 31, 2012
Rigs
Jun. 30, 2013
Drilling Assets
Dec. 31, 2013
Drilling Assets
Jun. 30, 2013
Corporate Asset
Dec. 31, 2012
Software Costs
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items]                          
Asset impairment charges   $ 26,280,000 $ 316,004,000 $ 2,825,000 $ 79,300,000 $ 10,000,000 $ 2,100,000 $ 12,200,000 $ 0 $ 10,600,000 $ 11,100,000 $ 2,900,000 $ 1,300,000
Assets held-for-sale                   6,200,000 5,900,000    
Goodwill impairment loss $ 235,400,000   $ 235,400,000