| 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: Cumulative Effect of Change in Accounting Principle Presented on Income Statement, Net of Tax, Including Portion Attributable to Noncontrolling Interest (Deprecated 2011-01-31) |
| Filer taxonomy standard label: | Cumulative effect of change in accounting principle presented on income statement, net of tax, including portion attributable to noncontrolling interest |
| Documentation: | This element represents the effect on net income, net of income taxes, of a change in accounting principle reported on the income statement in the period, which occurred before retrospective adjustments were required, recognized by the economic entity. The economic entity includes both controlling and noncontrolling interests. |
| Balance type: | Credit |
| Period type: | For Period (duration) |
| Report element type: | [Concept] |
| Data type: | Monetary (xbrli:monetaryItemType) |
| ID: | us-gaap_CumulativeEffectOfChangeInAccountingPrinciplePresentedOnIncomeStatementNetOfTax |
| Name: | us-gaap:CumulativeEffectOfChangeInAccountingPrinciplePresentedOnIncomeStatementNetOfTax |
| 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) | Cumulative effect of change in accounting principle presented on income statement, net of tax, including portion attributable to noncontrolling interest | en-US |
| References of Report Element, FASB Accounting Standards Codification: |
| Publisher, Name: | Topic | Sub Topic | Glossary | URI |
| FASB, Accounting Standards Codification | 250 | 10 | http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794 |
| 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 |
| AICPA | Accounting Principles Board Opinion (APB) | 20 | 19, 20 | ||||||
| AICPA | Accounting Principles Board Opinion (APB) | 9 | 26 | ||||||
| FASB | Statement of Financial Accounting Standard (FAS) | 109 | 36 | a |