Income Taxes - Reconciliation of Effective Tax Rate to U.S. Federal Statutory Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Amount
Computed expected income taxes	$ 68,181	$ 90,945	$ 176,724
State and local income taxes, net of Federal income tax benefit	11,638	20,419	23,898
International operations (including foreign rate differential)	4,518	2,258	(11,577)
Tax exempt income	(634)	(2,202)	(3,850)
Foreign tax credits, net	(1,664)	(8,006)	(32,974)
Meals and entertainment	3,641	4,528	4,129
Non-deductible executive compensation	3,720	3,011	442
Federal benefits related to prior year tax filings	(653)	0	(3,786)
Change in unrecognized tax benefits related to prior years	(7,690)	(18,497)	(2,953)
Deferred tax asset remeasurement related to the Tax Act	0	112,733	0
Transition tax on foreign earnings related to the Tax Act	139	52,417	0
Other, net	(912)	(6,956)	(2,713)
Total income tax expense	$ 80,284	$ 250,650	$ 147,340
Percent
Computed expected income taxes	21.00%	22.20%	35.00%
State and local income taxes, net of Federal income tax benefit	3.60%	5.00%	4.70%
International operations (including foreign rate differential)	1.40%	0.60%	(2.30%)
Tax exempt income	(0.20%)	(0.50%)	(0.80%)
Foreign tax credits, net	(0.50%)	(2.00%)	(6.50%)
Meals and entertainment	1.10%	1.10%	0.80%
Non-deductible executive compensation	1.10%	0.70%	0.10%
Federal benefits related to prior year tax filings	(0.20%)	0.00%	(0.80%)
Change in unrecognized tax benefits related to prior years	(2.40%)	(4.50%)	(0.60%)
Deferred tax asset remeasurement related to the Tax Act	0.00%	27.50%	0.00%
Transition tax on foreign earnings related to the Tax Act	0.10%	12.80%	0.00%
Other, net	(0.30%)	(1.70%)	(0.40%)
Total income tax expense, percent	24.70%	61.20%	29.20%