Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	May 31, 2018	May 31, 2017
OPERATING ACTIVITIES
Net income	$ 186,016	$ 34,500
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	53,598	54,770
Stock-based compensation	1,585	1,707
Amortization of financing costs	806	841
Deferred income taxes	(136,870)	(3,220)
Income from equity investments	(10,659)	(9,426)
Distribution from equity investee	11,138	9,850
Loss on retirements of long-lived assets, non-cash	2,601	404
Other, net	(233)	99
Changes in operating assets and liabilities:
Receivables, net	(15,331)	(20,425)
Prepaid expenses and other assets	(16,521)	(7,414)
Accounts payable and other liabilities	(7,364)	(10,905)
Deferred income	53,696	51,462
Income taxes	19,013	4,119
Net cash provided by operating activities	141,475	106,362
INVESTING ACTIVITIES
Capital expenditures	(65,019)	(40,568)
Distribution from equity investee	487	0
Proceeds from sale of assets	418	14
Other, net	0	(8)
Net cash used in investing activities	(64,114)	(40,562)
FINANCING ACTIVITIES
Payment of long-term debt	(473)	(444)
Deferred financing fees		(43)
Exercise of Class A common stock options	718	358
Reacquisition of previously issued common stock	(7,175)	(17,323)
Net cash (used in) provided by financing activities	(6,930)	(17,452)
Net increase in cash and cash equivalents	70,431	48,348
Cash and cash equivalents at beginning of period	256,702	263,727
Cash and cash equivalents at end of period	$ 327,133	$ 312,075