New Accounting Standards	3 Months Ended
Mar. 31, 2012
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New Accounting Pronouncements [Text Block]	New Accounting Standards Accounting Standards Issued There have been no new accounting pronouncements or changes in accounting pronouncements issued during the three months ended March 31, 2012 that are of significance, or potential significance, to us. Accounting Standards Adopted In May 2011, the Financial Accounting Standards Board (FASB) issued guidance related to fair value measurement, which amends current guidance to achieve common fair value measurement and disclosure requirements in GAAP and International Financial Reporting Standards. The guidance expanded the disclosures for the unobservable inputs for Level 3 fair value measurements, requiring quantitative information to be disclosed related to (1) the valuation processes used, (2) the sensitivity of the fair value measurement to changes in unobservable inputs and the interrelationships between those unobservable inputs, and (3) use of a nonfinancial asset in a way that differs from the asset’s highest and best use. This revised guidance was effective during the first quarter of 2012. The adoption of this standard did not have a material effect on our financial statement disclosures. In June 2011, the FASB issued guidance on the presentation of comprehensive income in financial statements. Entities are required to present total comprehensive income either in a single, continuous statement of comprehensive income or in two separate, but consecutive, statements. We adopted this standard during the first quarter of 2012 and present net income and other comprehensive income in one continuous statement. The adoption of this standard did not have a material effect on our financial statement disclosures.

New Accounting Standards

Accounting Standards Issued

There have been no new accounting pronouncements or changes in accounting pronouncements issued during the three months ended March 31, 2012 that are of significance, or potential significance, to us.

Accounting Standards Adopted

In May 2011, the Financial Accounting Standards Board (FASB) issued guidance related to fair value measurement, which amends current guidance to achieve common fair value measurement and disclosure requirements in GAAP and International Financial Reporting Standards. The guidance expanded the disclosures for the unobservable inputs for Level 3 fair value measurements, requiring quantitative information to be disclosed related to (1) the valuation processes used, (2) the sensitivity of the fair value measurement to changes in unobservable inputs and the interrelationships between those unobservable inputs, and (3) use of a nonfinancial asset in a way that differs from the asset’s highest and best use. This revised guidance was effective during the first quarter of 2012. The adoption of this standard did not have a material effect on our financial statement disclosures.

In June 2011, the FASB issued guidance on the presentation of comprehensive income in financial statements. Entities are required to present total comprehensive income either in a single, continuous statement of comprehensive income or in two separate, but consecutive, statements. We adopted this standard during the first quarter of 2012 and present net income and other comprehensive income in one continuous statement. The adoption of this standard did not have a material effect on our financial statement disclosures.