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Income Taxes
9 Months Ended
Sep. 30, 2013
Income Taxes [Abstract]  
Income Taxes
12.  Income Taxes

The difference in the Company's effective tax rates for both the three months and nine months ended September 30, 2013 and 2012 was due to the impact of the Company's improved financial results under generally accepted accounting principles. The Company's tax expense mainly reflects its cash tax position for states that do not allow for or have suspended the use of net operating losses for the period.

The Company recorded additional interest charges related to its tax contingency reserve as well as an additional reserve for an uncertain tax position for the nine months ended September 30, 2013.  Tax returns for years 2009 through 2012 are subject to future examination by tax authorities.  In addition, certain tax returns are open from 2002 through 2008 to the extent of the net operating losses generated during those periods.