Basis of Presentation (Policies)	3 Months Ended
Mar. 31, 2013
Basis of Presentation [Abstract]
Adopted Accounting Standards	Adopted Accounting Standards Comprehensive Income Effective January 1, 2013, the Company prospectively adopted accounting guidance to improve the disclosure of reclassifications out of accumulated other comprehensive income. The guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, the reclassifications are required to be cross-referenced to other disclosures that provide additional detail about those amounts. As shown in “Note 8 — Accumulated Other Comprehensive Income”, certain disclosures in the Company’s Notes to Consolidated Financial Statements have been expanded to address additional information required by this guidance. The adoption of this accounting guidance did not have an effect on the results of operations or financial position of the Company. Balance Sheet Offsetting Effective January 1, 2013, the Company adopted accounting guidance to address disclosures about offsetting assets and liabilities. The guidance clarifies which instruments and transactions are subject to the offsetting disclosure requirements. The instruments and transactions include bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions. The adoption of this accounting guidance did not have an effect on the results of operations or financial position of the Company.

Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2013

Adopted Accounting Standards

Comprehensive Income

Effective January 1, 2013, the Company prospectively adopted accounting guidance to improve the disclosure of reclassifications out of accumulated other comprehensive income. The guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, the reclassifications are required to be cross-referenced to other disclosures that provide additional detail about those amounts. As shown in “Note 8 — Accumulated Other Comprehensive Income”, certain disclosures in the Company’s Notes to Consolidated Financial Statements have been expanded to address additional information required by this guidance. The adoption of this accounting guidance did not have an effect on the results of operations or financial position of the Company.

Balance Sheet Offsetting

Effective January 1, 2013, the Company adopted accounting guidance to address disclosures about offsetting assets and liabilities. The guidance clarifies which instruments and transactions are subject to the offsetting disclosure requirements. The instruments and transactions include bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions. The adoption of this accounting guidance did not have an effect on the results of operations or financial position of the Company.