| Report Element Information |
| Run date/time: 6/5/2011 7:34:42 AM |
| Report Element Attributes: |
| Report element from taxonomy prefix: | us-gaap |
| US GAAP taxonomy standard label: | us-gaap: Property, Plant and Equipment, Estimated Useful Lives |
| Filer taxonomy standard label: | Property, Plant and Equipment, Estimated Useful Lives |
| Documentation: | Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). |
| Balance type: | |
| Period type: | For Period (duration) |
| Report element type: | [Concept] |
| Data type: | Text/String (xbrli:stringItemType) |
| ID: | us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives |
| Name: | us-gaap:PropertyPlantAndEquipmentEstimatedUsefulLives |
| Labels of Report Element: (Labels from filer taxonomy, does not include other labels) |
| Role: | Label | Lang |
| Standard label (http://www.xbrl.org/2003/role/label) | Property, Plant and Equipment, Estimated Useful Lives | en-US |
| References of Report Element, FASB Accounting Standards Codification: |
| Publisher, Name: | Topic | Sub Topic | Glossary | URI |
| FASB, Accounting Standards Codification | 235 | 10 | http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 | |
| FASB, Accounting Standards Codification | 360 | 10 | http://asc.fasb.org/subtopic&trid=2155824 |
| References of Report Element, SEC Regulation S-X (SX): |
| Publisher, Name: | Number | Section | Paragraph | Subparagraph | Article |
| References of Report Element, US GAAP Legacy: |
| Publisher: | Name | Number | Chapter | Section | Paragraph | Subparagraph | Article | Clause | Appendix |