| Report Element Information |
| Run date/time: 6/5/2011 7:34:40 AM |
| Report Element Attributes: |
| Report element from taxonomy prefix: | us-gaap |
| US GAAP taxonomy standard label: | us-gaap: Common Stock, Value, Outstanding |
| Filer taxonomy standard label: | Common Stock, Value, Outstanding |
| Documentation: | Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares. |
| Balance type: | Credit |
| Period type: | As of (instant) |
| Report element type: | [Concept] |
| Data type: | Monetary (xbrli:monetaryItemType) |
| ID: | us-gaap_CommonStockValueOutstanding |
| Name: | us-gaap:CommonStockValueOutstanding |
| Labels of Report Element: (Labels from filer taxonomy, does not include other labels) |
| Role: | Label | Lang |
| Period end label (http://www.xbrl.org/2003/role/periodEndLabel) | Common Stock, Value, Outstanding, Ending Balance | en-US |
| Period start label (http://www.xbrl.org/2003/role/periodStartLabel) | Common Stock, Value, Outstanding, Beginning Balance | en-US |
| Standard label (http://www.xbrl.org/2003/role/label) | Common Stock, Value, Outstanding | en-US |
| References of Report Element, FASB Accounting Standards Codification: |
| Publisher, Name: | Topic | Sub Topic | Glossary | URI |
| FASB, Accounting Standards Codification | 210 | 10 | http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 |
| References of Report Element, SEC Regulation S-X (SX): |
| Publisher, Name: | Number | Section | Paragraph | Subparagraph | Article |
| SEC, Regulation S-X (SX) | 210 | 02 | 30 | 5 |
| References of Report Element, US GAAP Legacy: |
| Publisher: | Name | Number | Chapter | Section | Paragraph | Subparagraph | Article | Clause | Appendix |