Income Taxes (Tables)

6 Months Ended

May 31, 2016

Income Tax Disclosure [Abstract]

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					Six Months Ended
	May 31,					May 31,
(Dollars in thousands)	2016			2015		2016		2015
Provision for income taxes	$	(103,801	)	(95,226	)	(160,042	)	(154,952	)
Effective tax rate (1)	32.21		%	34.22	%	30.62	%	34.21	%

(1)

For the three months ended May 31, 2016, the effective tax rate included tax benefits for the domestic production activities deduction and energy tax credits, offset primarily by state income tax expense. For the six months ended May 31, 2016, the effective tax rate included tax benefits for (1) a settlement with the IRS, (2) the domestic production activities deduction, and (3) energy tax credits, offset primarily by state income tax expense. For both the three and six months ended May 31, 2015, 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 interest accrued on uncertain tax positions.