Income Taxes

9 Months Ended

Jun. 30, 2012

Income Taxes [Abstract]

Income Taxes

NOTE 2: Income Taxes

The Company’s provision for income taxes differs from the statutory rate primarily due to estimated federal and state benefits generated from estimated excess federal and Oklahoma percentage depletion, which are permanent tax benefits.

Both excess federal percentage depletion, which is limited to certain production volumes and by certain income levels, and excess Oklahoma percentage depletion, which has no limitation on production volume or income, reduce estimated taxable income or add to estimated taxable loss projected for any year. The federal and Oklahoma excess percentage depletion estimates will be updated throughout the year until finalized with the detail well-by-well calculations at fiscal year-end. Federal and Oklahoma excess percentage depletion benefits, when a provision for income taxes is recorded, decrease the effective tax rate, while the effect is to increase the effective tax rate when a benefit for income taxes is recorded. The benefits of federal and Oklahoma excess percentage depletion are not directly related to the amount of pre-tax income recorded in a period. Accordingly, in periods where a recorded pre-tax income or loss is relatively small, the proportional effect of these items on the effective tax rate may be significant. The effective tax rate for the nine months ended June 30, 2012, was 29% as compared to 27% for the nine months ended June 30, 2011. The effective tax rate for the quarter ended June 30, 2012, was 34% as compared to 28% for the quarter ended June 30, 2011. This increase is the result of an increase in the estimated annual effective tax rate during the third quarter due to higher expected fiscal 2012 income before provision for income taxes (mostly related to higher lease bonus income) projected as of June 30, 2012, as compared to projections as of March 31, 2012.