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Basis of Presentation and Summary of Significant Accounting Policies (Details)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Basis of Presentation and Summary of Significant Accounting Policies (Textual) [Abstract]      
Anti-dilutive securities excluded from computation of earnings per share 11 51 34