Recently issued accounting pronouncements	3 Months Ended
Mar. 31, 2012
Recently issued accounting pronouncements
Recently issued accounting pronouncements	13. Recently issued accounting pronouncements Fair value measurements and disclosures Effective January 1, 2012, we adopted an update to the accounting rules for fair value measurement. The new accounting principal establishes a consistent definition of fair value in an effort to ensure that the fair value measurement and disclosure requirements between U.S. GAAP and International Financial Reporting Standards ("IFRS") are comparable. This update changes certain fair value measurement principles and enhances the disclosure requirements for fair value measurements. This update does not extend the use of fair value accounting, but provides guidance on how it should be applied where its use was already required or permitted by other standards within U.S. GAAP or IFRS. This update is effective for interim and annual periods beginning after December 15, 2011 and is applied prospectively. The adoption of this pronouncement did not have a material impact on the Company's Condensed Consolidated Financial Statements and accompanying disclosures. Statement of comprehensive income Effective January 1, 2012, we adopted the FASB issued authoritative guidance on the presentation of comprehensive income. This update requires that all non-owner changes in stockholders' equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This update does not change the items that must be reported in other comprehensive income or when an item of other comprehensive income must be reclassified to net income. The adoption of this pronouncement did not have a material impact on the Company's Condensed Consolidated Financial Statements and accompanying disclosures. Goodwill impairment Effective January 1, 2012, the Company adopted an update to the authoritative guidance related to goodwill impairment testing. This update gives companies the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount before performing the two-step test mandated prior to the update. If, after assessing the totality of events and circumstances, a company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then it must perform the two-step test. Otherwise, a company may skip the two-step test. Companies are not required to perform the qualitative assessment and may, instead proceed directly to the first step of the two-part test. The adoption of this updated guidance does not have a material impact on the Company's Condensed Consolidated Financial Statements.

Recently issued accounting pronouncements

3 Months Ended

Mar. 31, 2012

Recently issued accounting pronouncements

Recently issued accounting pronouncements

13. Recently issued accounting pronouncements

Fair value measurements and disclosures

Effective January 1, 2012, we adopted an update to the accounting rules for fair value measurement. The new accounting principal establishes a consistent definition of fair value in an effort to ensure that the fair value measurement and disclosure requirements between U.S. GAAP and International Financial Reporting Standards ("IFRS") are comparable. This update changes certain fair value measurement principles and enhances the disclosure requirements for fair value measurements. This update does not extend the use of fair value accounting, but provides guidance on how it should be applied where its use was already required or permitted by other standards within U.S. GAAP or IFRS. This update is effective for interim and annual periods beginning after December 15, 2011 and is applied prospectively. The adoption of this pronouncement did not have a material impact on the Company's Condensed Consolidated Financial Statements and accompanying disclosures.

Statement of comprehensive income

Effective January 1, 2012, we adopted the FASB issued authoritative guidance on the presentation of comprehensive income. This update requires that all non-owner changes in stockholders' equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. This update does not change the items that must be reported in other comprehensive income or when an item of other comprehensive income must be reclassified to net income. The adoption of this pronouncement did not have a material impact on the Company's Condensed Consolidated Financial Statements and accompanying disclosures.

Goodwill impairment

Effective January 1, 2012, the Company adopted an update to the authoritative guidance related to goodwill impairment testing. This update gives companies the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount before performing the two-step test mandated prior to the update. If, after assessing the totality of events and circumstances, a company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then it must perform the two-step test. Otherwise, a company may skip the two-step test. Companies are not required to perform the qualitative assessment and may, instead proceed directly to the first step of the two-part test. The adoption of this updated guidance does not have a material impact on the Company's Condensed Consolidated Financial Statements.