Income Taxes (Tables)

3 Months Ended

Feb. 29, 2016

Income Tax Disclosure [Abstract]

Income Tax Benefit (Provision) [Table Text Block]

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

	Three Months Ended
	February 29,			February 28,
(Dollars in thousands)	2016			2015
Provision for income taxes	$	(56,241	)	(59,726	)
Effective tax rate (1)	28.08		%	34.19	%

(1) For the three months ended February 29, 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 the three months ended February 28, 2015, the effective tax rate included a tax benefit for the domestic production activities deduction and energy tax credits, offset primarily by state income tax expense and interest accrued on uncertain tax positions.