XML 22 R73.htm IDEA: XBRL DOCUMENT v2.4.0.8
Asset Retirement Obligations - Reconciliation of Beginning and Ending Aggregate Carrying Amounts of Asset Retirement Obligations (Parenthetical) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 1 Months Ended
Mar. 31, 2014
Feb. 28, 2014
Gulf Properties
Reconciliation Of Changes In Asset Retirement Obligations    
Liability settled or disposed in current period(1) $ (377,578) [1] $ (366,000)
[1] Includes $366.0 million associated with the Gulf Properties sold in February 2014.