Income Taxes (Tables)

3 Months Ended

Feb. 28, 2018

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
	February 28,
(Dollars in thousands)	2018			2017
Provision for income taxes		($132,611	)	(19,969	)
Effective tax rate (1)	49.3		%	34.4	%

(1) For the three months ended February 28, 2018, the effective tax rate included a $68.6 million non-cash one-time write down of the deferred tax assets due to the enactment of the Tax Cuts and Jobs Act and state income tax expense, offset primarily by tax benefits for the domestic production activities deduction, and solar tax credits. Excluding the impact of the write down of the deferred tax assets, the effective tax rate for the three months ended February 28, 2018 was 23.8%. For the three months ended February 28, 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.