- Definition
                Tabular disclosure of the carrying amount of a liability for asset retirement obligations.
               
+ References
                Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 410
 -SubTopic 20
 -Section 50
 -Paragraph 1
 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849
               
+ Details
                
                  
                    | Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock | 
                  
                    | Namespace Prefix: | us-gaap_ | 
                  
                    | Data Type: | nonnum:textBlockItemType | 
                  
                    | Balance Type: | na | 
                  
                    | Period Type: | duration |