Accounting changes:	12 Months Ended
Dec. 31, 2012
Accounting changes:
Accounting changes:	3. Accounting changes: (a) Adoption of new accounting standards: Fair value measurements: In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updated (“ASU”) No. 2011-04, Fair Value Measurements (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS, (“ASU 2011-04”). ASU 2011-04 changes the language used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements to ensure consistency between U.S. GAAP and IFRS. ASU 2011-04 also expands the disclosures for fair value measurements that are estimated using significant unobservable (Level 3) inputs. This new guidance is to be applied prospectively. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statement note disclosures. Comprehensive income: In June 2011, the FASB issued ASU No. 2011-05, Comprehensive Income (Topic 220): Presentation of Comprehensive Income, (“ASU 2011-05”). ASU 2011-05 eliminates the option to report other comprehensive income and its components in the statement of changes in equity. ASU 2011-05 requires that all non-owner changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued ASU No. 2011-12 (“ASU 2011-12”), which defers certain requirements within ASU 2011-05. These amendments are being made to allow the FASB time to redeliberate whether to present on the face of the financial statements the effects of reclassifications out of accumulated other comprehensive income on the components of net income and other comprehensive income in all periods presented. This new guidance is to be applied retrospectively. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements. Intangibles – goodwill and other: In September 2011, the FASB issued ASU No. 2011-08, Intangibles - Goodwill and Other (Topic 350) - Testing Goodwill for Impairment (“ASU 2011-08”), which allows an entity to use a qualitative approach to test goodwill for impairment. ASU 2011-08 permits an entity 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 value. If it is concluded that this is the case, it is necessary to perform the currently prescribed two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s goodwill impairment test and the Company’s consolidated financial statement note disclosures. (b) New accounting pronouncements: Balance sheet: In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities (“ASU 2011-11”). ASU 2011-11 enhances disclosures regarding financial instruments and derivative instruments. Entities are required to provide both net information and gross information for these assets and liabilities in order to enhance comparability between those entities that prepare their financial statements on the basis of U.S. GAAP and those entities that prepare their financial statements on the basis of IFRS. This new guidance is to be applied retrospectively and is effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods. The Company anticipates that the adoption of this standard will expand its consolidated financial statement note disclosures.

3. Accounting changes:

(a) Adoption of new accounting standards:

Fair value measurements:

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updated (“ASU”) No. 2011-04, Fair Value Measurements (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS, (“ASU 2011-04”). ASU 2011-04 changes the language used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements to ensure consistency between U.S. GAAP and IFRS. ASU 2011-04 also expands the disclosures for fair value measurements that are estimated using significant unobservable (Level 3) inputs. This new guidance is to be applied prospectively. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statement note disclosures.

Comprehensive income:

In June 2011, the FASB issued ASU No. 2011-05, Comprehensive Income (Topic 220): Presentation of Comprehensive Income, (“ASU 2011-05”). ASU 2011-05 eliminates the option to report other comprehensive income and its components in the statement of changes in equity. ASU 2011-05 requires that all non-owner changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued ASU No. 2011-12 (“ASU 2011-12”), which defers certain requirements within ASU 2011-05. These amendments are being made to allow the FASB time to redeliberate whether to present on the face of the financial statements the effects of reclassifications out of accumulated other comprehensive income on the components of net income and other comprehensive income in all periods presented. This new guidance is to be applied retrospectively. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements.

Intangibles – goodwill and other:

In September 2011, the FASB issued ASU No. 2011-08, Intangibles - Goodwill and Other (Topic 350) - Testing Goodwill for Impairment (“ASU 2011-08”), which allows an entity to use a qualitative approach to test goodwill for impairment. ASU 2011-08 permits an entity 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 value. If it is concluded that this is the case, it is necessary to perform the currently prescribed two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This update was effective for the Company on January 1, 2012. The adoption of this update did not have a material impact on the Company’s goodwill impairment test and the Company’s consolidated financial statement note disclosures.

(b) New accounting pronouncements:

Balance sheet:

In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities (“ASU 2011-11”). ASU 2011-11 enhances disclosures regarding financial instruments and derivative instruments. Entities are required to provide both net information and gross information for these assets and liabilities in order to enhance comparability between those entities that prepare their financial statements on the basis of U.S. GAAP and those entities that prepare their financial statements on the basis of IFRS. This new guidance is to be applied retrospectively and is effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods. The Company anticipates that the adoption of this standard will expand its consolidated financial statement note disclosures.