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Income Taxes
6 Months Ended
Jun. 30, 2013
Income Taxes [Abstract]  
Income Taxes [Text Block]
Income Taxes
The Company uses an estimated annual effective tax rate based upon a projection of its annual fiscal year results to measure the income tax benefit or expense recognized in each interim period. The Company’s effective tax rate, including the impact of discrete benefit items, was 37% and 38% for the three months ended June 30, 2013 and 2012, respectively, and 37% for both the six months ended June 30, 2013 and 2012.

The Company's 2010 tax year is currently under examination by the State of California Franchise Tax Board. The Company does not expect a material impact on its consolidated financial statements as a result of this examination. The 2009 through 2012 tax periods remain open to examination by federal and most state tax authorities. For the Company's foreign jurisdictions, the 2009 through 2012 tax years remain open to examination by their respective tax authorities.