Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022	Nov. 30, 2022
Income Tax Disclosure [Abstract]
Income tax credits and adjustments	$ 6,900,000	$ 15,300,000	$ 19,400,000	$ 16,100,000
Tax benefits from share-based compensation	1,900,000		5,700,000	2,200,000
Nondeductible expense	2,600,000	$ 2,900,000	9,200,000	$ 6,800,000
Deferred tax assets	163,100,000		163,100,000		$ 178,000,000
Deferred tax assets, valuation allowance	$ 17,100,000		17,100,000		$ 17,100,000
Adjustments to deferred tax valuation allowance			$ 0