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
Stock Repurchased During Period, Shares				(8,373,000)
Stock Repurchased During Period, Value	$ (85,938)			$ (85,938)
Beginning balance, shares at Nov. 30, 2015		115,548,000	(10,136,000)	(13,137,000)
Beginning 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				(210,000)
Tax payments associated with stock-based compensation awards	(2,421)			$ (2,421)
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)
Tax payments associated with stock-based compensation awards	(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)
Stock Repurchased During Period, Shares				(1,806,000)
Stock Repurchased During Period, Value	(35,039)			$ (35,039)
Net income	170,365					170,365
Other comprehensive income (loss), net of tax	7,359						7,359
Dividends on common stock	$ (8,892)					(8,892)
Employee stock options/other, shares	1,195,926	1,196,000
Employee stock options/other	$ 20,011	$ 1,196			18,815
Stock awards, shares		54,000	741,000	48,000
Stock awards	0	$ 54	$ 8,037	$ 498	(8,589)
Stock-based compensation	15,861				15,861
Stock repurchases, shares				(334,000)
Tax payments associated with stock-based compensation awards	(8,476)			$ (8,476)
Ending balance, shares at Nov. 30, 2018		119,196,000	(8,157,000)	(24,113,000)
Ending balance at Nov. 30, 2018	$ 2,087,500	$ 119,196	$ (88,472)	$ (584,397)	$ 753,570	$ 1,897,168	$ (9,565)