| **Accounting Standards**                       | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
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| **Notes to Financial Statements [Abstract]**   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Impact of Recently Issued Accounting Standards | 9.  Accounting StandardsIn June 2011, the FASB issued ASU No. 2011-05, which requires that comprehensive income and the related components be presented in a single continuous statement or in two separate but consecutive statements. The ASU, which is applied retrospectively, is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. We are currently evaluating the effect this ASU will have on our consolidated financial statements. |

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| - Definition
Represents disclosure of any changes in an accounting principle, including a change from one generally accepted accounting principle to another generally accepted accounting principle when there are two or more generally accepted accounting principles that apply or when the accounting principle formerly used is no longer generally accepted. Also disclose any change in the method of applying an accounting principle, or any change in an accounting principle required by a new pronouncement in the unusual instance that a new pronouncement does not include specific transition provisions.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 154 -Paragraph 2, 17, 18Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 23, 24Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 01 -Paragraph b -Subparagraph 6 -Article 10
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