Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Grantor Stock Ownership Trust	Treasury Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance, shares at Nov. 30, 2014		115,387,000	(10,336,000)	(13,097,000)
Beginning balance at Nov. 30, 2014	$ 1,595,910	$ 115,387	$ (112,106)	$ (446,476)	$ 668,857	$ 1,391,256	$ (21,008)
Net income	84,643					84,643
Other comprehensive income (loss), net of tax	3,689						3,689
Dividends on common stock	$ (9,186)					(9,186)
Employee stock options/other, shares	76,164	76,000
Employee stock options/other	$ (798)	$ 76			(874)
Stock awards, shares		85,000	200,000
Stock awards	0	$ 85	$ 2,170		(2,255)
Stock-based compensation	17,143				17,143
Stock repurchases, shares				(40,000)
Stock repurchases	(567)			$ (567)
Ending balance, shares at Nov. 30, 2015		115,548,000	(10,136,000)	(13,137,000)
Ending balance at Nov. 30, 2015	1,690,834	$ 115,548	$ (109,936)	$ (447,043)	682,871	1,466,713	(17,319)
Net income	105,615					105,615
Other comprehensive income (loss), net of tax	1,262						1,262
Dividends on common stock	$ (8,586)					(8,586)
Employee stock options/other, shares	551,898	552,000
Employee stock options/other	$ 5,529	$ 552			4,977
Stock awards, shares		124,000	704,000
Stock awards	0	$ 124	$ 7,636		(7,760)
Stock-based compensation	16,850				16,850
Stock repurchases, shares				(8,583,000)
Stock repurchases	(88,359)			$ (88,359)
Ending balance, shares at Nov. 30, 2016		116,224,000	(9,432,000)	(21,720,000)
Ending balance at Nov. 30, 2016	1,723,145	$ 116,224	$ (102,300)	$ (535,402)	696,938	1,563,742	(16,057)
Net income	180,595					180,595
Other comprehensive income (loss), net of tax	(867)						(867)
Dividends on common stock	$ (8,642)					(8,642)
Employee stock options/other, shares	1,650,360	1,652,000
Employee stock options/other	$ 24,120	$ 1,652			22,468
Stock awards, shares		70,000	534,000	28,000
Stock awards	0	$ 70	$ 5,791	$ 695	(6,556)
Stock-based compensation	14,633				14,633
Stock repurchases, shares				(329,000)
Stock repurchases	(6,673)			$ (6,673)
Ending balance, shares at Nov. 30, 2017		117,946,000	(8,898,000)	(22,021,000)
Ending balance at Nov. 30, 2017	$ 1,926,311	$ 117,946	$ (96,509)	$ (541,380)	$ 727,483	$ 1,735,695	$ (16,924)