Income Taxes (Tables)

9 Months Ended

Aug. 31, 2018

Schedule of Income Tax Benefit (Provision) and Effective Tax Rate

The provision for income taxes and effective tax rate were as follows:



	Three Months Ended					Nine Months Ended
	August 31,					August 31,
(Dollars in thousands)	2018			2017		2018		2017
Provision for income taxes		$98,298		124,795		306,870		253,656
Effective tax rate (1)	17.8		%	33.4	%	25.4	%	33.6	%

(1)

For the three months ended August 31, 2018, the effective tax rate included tax benefits for tax accounting method changes implemented during the third quarter, energy credits and the domestic production activities deduction. For the nine months ended August 31, 2018, the effective tax rate included a non-cash one-time write down of the deferred tax assets due to the enactment of the Tax Cuts and Jobs Act, offset primarily by tax accounting method changes, energy tax credits and tax benefits for the domestic production activities deduction. Excluding the one-time non-cash deferred tax asset write down of $68.6 million recorded in the first quarter of 2018 due to the tax reform bill and the $34.1 million benefit recorded in the third quarter of 2018, primarily related to tax accounting method changes and energy credits, the tax rate for the nine months ended August 31, 2018 would have been 22.6%. For the three months ended August 31, 2017, the effective tax rate included tax benefits for the domestic production activities deduction, and energy tax credits, offset primarily by state income tax expense and a valuation allowance recorded against state net operating losses the Company expects to expire unutilized. For the nine months ended August 31, 2017, the effective tax rate included tax benefits for (1) settlements with the IRS, (2) the domestic production activities deduction, and (3) energy tax credits, offset primarily by state income tax expense, and a valuation allowance recorded against state net operating losses the Company expects to expire unutilized.