Derivative Instruments (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019	Nov. 30, 2019	Jul. 09, 2019
Other Noncurrent Liabilities
Derivative [Line Items]
Derivative liabilities	$ 7,500,000		$ 7,500,000		$ 2,100,000
Interest Rate Swap
Derivative [Line Items]
Notional amount						$ 150,000,000.0
Fixed interest rate						1.855%
Interest Rate Swap | London Interbank Offered Rate (LIBOR)
Derivative [Line Items]
Basis spread on variable rate						0.00%
Forward Contracts
Derivative [Line Items]
Minimum maturity period, foreign currency derivative			30 days
Maximum maturity period, foreign currency derivative			2 years
Gain (loss) on foreign currency forward contracts	(4,500,000)	$ 1,600,000	$ (2,100,000)	$ 2,900,000
Forward Contracts | Other Assets
Derivative [Line Items]
Derivative liabilities	1,400,000		1,400,000
Forward Contracts | Other Current Assets
Derivative [Line Items]
Derivative asset	$ 500,000		$ 500,000
Forward Contracts | Other Noncurrent Liabilities
Derivative [Line Items]
Derivative liabilities					$ 100,000