Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was a 29 percent benefit in third quarter 2013 and less than one percent benefit in first nine months 2013, which includes a four percent benefit for noncontrolling interests. Our third quarter and first nine months 2013 effective tax rates include a benefit from recognition of $6,326,000 of previously unrecognized tax benefits upon lapse of the statute of limitations for a previously reserved tax position. Our effective tax rates in third quarter and first nine months 2013 would have been 33 percent excluding the impact of the foregoing tax benefits. At third quarter-end 2013, we had no unrecognized tax benefits. Our effective tax rate was a 74 percent benefit in third quarter 2012 and 22 percent expense in first nine months 2012, which included a ten percent benefit for noncontrolling interests. In addition, our third quarter and first nine months 2012 effective tax rates included a non-cash benefit of 38 percent and nine percent associated with state deferred tax rate changes due to our acquisition of Credo and operating in more states. Our 2013 and 2012 effective tax rates also include the effect of state income taxes, nondeductible items and benefits of percentage depletion. We have not provided a valuation allowance for our federal deferred tax asset because we believe it is likely it will be recoverable in future periods.

Income Taxes

9 Months Ended

Sep. 30, 2013

Our effective tax rate was a 29 percent benefit in third quarter 2013 and less than one percent benefit in first nine months 2013, which includes a four percent benefit for noncontrolling interests. Our third quarter and first nine months 2013 effective tax rates include a benefit from recognition of $6,326,000 of previously unrecognized tax benefits upon lapse of the statute of limitations for a previously reserved tax position. Our effective tax rates in third quarter and first nine months 2013 would have been 33 percent excluding the impact of the foregoing tax benefits. At third quarter-end 2013, we had no unrecognized tax benefits.

Our effective tax rate was a 74 percent benefit in third quarter 2012 and 22 percent expense in first nine months 2012, which included a ten percent benefit for noncontrolling interests. In addition, our third quarter and first nine months 2012 effective tax rates included a non-cash benefit of 38 percent and nine percent associated with state deferred tax rate changes due to our acquisition of Credo and operating in more states.

Our 2013 and 2012 effective tax rates also include the effect of state income taxes, nondeductible items and benefits of percentage depletion.

We have not provided a valuation allowance for our federal deferred tax asset because we believe it is likely it will be recoverable in future periods.