Income Taxes	6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes For the three and six months ended June 31, 2014 and 2013, income tax expense was primarily derived by applying the federal statutory rate of 35% to operating income before income taxes. The uncertain tax position increased during the six months ended June 30, 2014, by $5.8 million from the estimated state tax liability as a result of increased revenues. We expect to release tax liabilities related to uncertain tax positions related to federal tax credits taken on the 2009 income tax return in the third quarter of 2014 of approximately $6.5 million, which will result in a reduction to income tax expense. In general, our income tax returns are subject to examination by tax authorities for tax years 1996 forward. The California Franchise Tax Board is currently examining the Company’s 2008, 2009 and 2010 tax returns. Although the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year, we do not anticipate any material change to the amount of our unrecognized tax benefits over the next 12 months, except as described above.

Income Taxes

6 Months Ended

Jun. 30, 2014

13. Income Taxes

For the three and six months ended June 31, 2014 and 2013, income tax expense was primarily derived by applying the federal statutory rate of 35% to operating income before income taxes.

The uncertain tax position increased during the six months ended June 30, 2014, by $5.8 million from the estimated state tax liability as a result of increased revenues. We expect to release tax liabilities related to uncertain tax positions related to federal tax credits taken on the 2009 income tax return in the third quarter of 2014 of approximately $6.5 million, which will result in a reduction to income tax expense.

In general, our income tax returns are subject to examination by tax authorities for tax years 1996 forward. The California Franchise Tax Board is currently examining the Company’s 2008, 2009 and 2010 tax returns. Although the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year, we do not anticipate any material change to the amount of our unrecognized tax benefits over the next 12 months, except as described above.