Accounting Pronouncements	12 Months Ended
Dec. 31, 2011
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Pronouncements	Accounting Pronouncements In June 2011, the FASB issued Accounting Standards Update No. 2011-05 (ASU 2011-05), Comprehensive Income (Topic 220), Presentation of Comprehensive Income. This standard eliminates the current option to present other comprehensive income and its components in the statement of changes in equity. It will require companies to report the total of comprehensive income including the components of net income and the components of other comprehensive income in either a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued Accounting Standards Update No. 2011-12 (ASU 2011-12), Comprehensive Income (Topic 220), Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05. This standard allows time for the FASB 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 for all periods presented. All other requirements in ASU 2011-05 are not affected by ASU 2011-12. ASU 2011-05 and ASU 2011-12 are effective for the Company for the year beginning on January 1, 2012. In September 2011, the FASB issued Accounting Standards Update No. 2011-08 (ASU 2011-08), Intangibles - Goodwill and Other (Topic 350), Testing Goodwill for Impairment. This standard permits a company to first assess qualitative factors to determine whether it is more likely than not that the fair value is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step process for goodwill impairment testing previously required under Topic 350. ASU 2011-08 is effective for the Company for the year beginning on January 1, 2012. In September 2011, the FASB issued Accounting Standards Update No. 2011-09 (ASU 2011-09), Compensation - Retirement Benefits - Multiemployer Plans (Subtopic 715-80), Disclosures about an Employer's Participation in a Multiemployer Plan. This standard requires an employer that participates in multiemployer pension plans to provide additional quantitative and qualitative disclosures in order to provide users with more detailed information about the employer's involvement in multiemployer pension plans. In addition, this standard also includes changes in the disclosures required for multiemployer plans that provide postretirement benefits other than pensions. ASU 2011-09 is effective for the Company for the fiscal year ending after December 15, 2011. The Company has included the appropriate disclosures related to postretirement benefits in accordance with ASU 2011-09 in Note 15. In December 2011, the FASB issued Accounting Standards Update No. 2011-11 (ASU 2011-11), Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities. This standard requires companies to disclose both gross and net information about instruments and transactions eligible for offset in the statement of financial position as well as disclose gross and net information about instruments and transactions subject to an agreement similar to a master netting arrangement. ASU 2011-11 is effective for the Company for the year beginning on January 1, 2013. The Company does not expect this standard to have a material impact to its financial position.

Accounting Pronouncements

In June 2011, the FASB issued Accounting Standards Update No. 2011-05 (ASU 2011-05), Comprehensive Income (Topic 220), Presentation of Comprehensive Income. This standard eliminates the current option to present other comprehensive income and its components in the statement of changes in equity. It will require companies to report the total of comprehensive income including the components of net income and the components of other comprehensive income in either a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued Accounting Standards Update No. 2011-12 (ASU 2011-12), Comprehensive Income (Topic 220), Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05. This standard allows time for the FASB 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 for all periods presented. All other requirements in ASU 2011-05 are not affected by ASU 2011-12. ASU 2011-05 and ASU 2011-12 are effective for the Company for the year beginning on January 1, 2012.

In September 2011, the FASB issued Accounting Standards Update No. 2011-08 (ASU 2011-08), Intangibles - Goodwill and Other (Topic 350), Testing Goodwill for Impairment. This standard permits a company to first assess qualitative factors to determine whether it is more likely than not that the fair value is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step process for goodwill impairment testing previously required under Topic 350. ASU 2011-08 is effective for the Company for the year beginning on January 1, 2012.

In September 2011, the FASB issued Accounting Standards Update No. 2011-09 (ASU 2011-09), Compensation - Retirement Benefits - Multiemployer Plans (Subtopic 715-80), Disclosures about an Employer's Participation in a Multiemployer Plan. This standard requires an employer that participates in multiemployer pension plans to provide additional quantitative and qualitative disclosures in order to provide users with more detailed information about the employer's involvement in multiemployer pension plans. In addition, this standard also includes changes in the disclosures required for multiemployer plans that provide postretirement benefits other than pensions. ASU 2011-09 is effective for the Company for the fiscal year ending after December 15, 2011. The Company has included the appropriate disclosures related to postretirement benefits in accordance with ASU 2011-09 in Note 15.

In December 2011, the FASB issued Accounting Standards Update No. 2011-11 (ASU 2011-11), Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities. This standard requires companies to disclose both gross and net information about instruments and transactions eligible for offset in the statement of financial position as well as disclose gross and net information about instruments and transactions subject to an agreement similar to a master netting arrangement. ASU 2011-11 is effective for the Company for the year beginning on January 1, 2013. The Company does not expect this standard to have a material impact to its financial position.