| Report Element Information |
| Run date/time: 6/5/2011 7:34:41 AM |
| Report Element Attributes: |
| Report element from taxonomy prefix: | us-gaap |
| US GAAP taxonomy standard label: | us-gaap: Long-term Debt, Maturities, Repayments of Principal in Year Four |
| Filer taxonomy standard label: | Long-term Debt, Maturities, Repayments of Principal in Year Four |
| Documentation: | Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. |
| Balance type: | Credit |
| Period type: | As of (instant) |
| Report element type: | [Concept] |
| Data type: | Monetary (xbrli:monetaryItemType) |
| ID: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour |
| Name: | us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour |
| 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) | Long-term Debt, Maturities, Repayments of Principal in Year Four | en-US |
| References of Report Element, FASB Accounting Standards Codification: |
| Publisher, Name: | Topic | Sub Topic | Glossary | URI |
| FASB, Accounting Standards Codification | 470 | 10 | http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 |
| 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 |
| FASB | Statement of Financial Accounting Standard (FAS) | 47 | 10 | b |