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Recent Accounting Pronouncements
3 Months Ended
Mar. 31, 2012
Recent Accounting Pronouncements [Abstract]  
Recent Accounting Pronouncements
(10) Recently Adopted Accounting Guidance

On January 1, 2012, we adopted an update issued by the Financial Accounting Standards Board ("FASB") to existing guidance on the presentation of comprehensive income.  This update requires the presentation of the components of net income and other comprehensive income either income either in a single continuous statement or in two separate but consecutive statements. Net income and other comprehensive income has been presented in two separate but consecutive statements for the current reporting period and prior comparative period in our condensed consolidated financial statements.