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Income Taxes
9 Months Ended
Sep. 30, 2014
Income Taxes [Abstract]  
Income Taxes
6.Income Taxes

Intraperiod tax allocation rules require us to allocate our provision for income taxes between continuing operations and other categories of earnings, such as other comprehensive income. In periods in which we have a year-to-date pre-tax loss from continuing operations and pre-tax income in other categories of earnings, such as other comprehensive income, we must allocate the tax provision to the other categories of earnings. We then record a related tax benefit in continuing operations. During the nine months ended September 30, 2013, we recorded unrealized gains on our investments in available-for-sale securities in other comprehensive income, net of taxes.  As a result, for the nine months ended September 30, 2013, we recorded a $6.4 million tax benefit, compared to income tax expense of $2,000 for the nine months ended September 30, 2014.