Recent Accounting Pronouncements	6 Months Ended
Jun. 30, 2012
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this ASU change the wording used to describe many of the requirements in U.S. generally accepted accounting principles (“GAAP”) for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the FASB does not intend for the amendments in this ASU to result in a change in the application of the requirements in Topic 820. Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. This update was adopted on January 1, 2012 and did not have a material impact on our consolidated financial statements.

Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2012

Recent Accounting Pronouncements [Abstract]

2. Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this ASU change the wording used to describe many of the requirements in U.S. generally accepted accounting principles (“GAAP”) for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the FASB does not intend for the amendments in this ASU to result in a change in the application of the requirements in Topic 820. Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. This update was adopted on January 1, 2012 and did not have a material impact on our consolidated financial statements.