- Definition
                Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.
               
+ References
                Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 505
 -SubTopic 30
 -Section 50
 -Paragraph 2
 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656
Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 505
 -SubTopic 30
 -Section 50
 -Paragraph 4
 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656
Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 505
 -SubTopic 30
 -Section 45
 -Paragraph 1
 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655
Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 505
 -SubTopic 30
 -Section 50
 -Paragraph 3
 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656
               
+ Details
                
                  
                    |  Name: | 
                    us-gaap_ScheduleOfTreasuryStockByClassTextBlock | 
                  
                  
                    |  Namespace Prefix: | 
                    us-gaap_ | 
                  
                  
                    |  Data Type: | 
                    nonnum:textBlockItemType | 
                  
                  
                    |  Balance Type: | 
                    na | 
                  
                  
                    |  Period Type: | 
                    duration |