Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) - USD ($)	Feb. 29, 2020	Nov. 30, 2019
Derivative [Line Items]
Derivative contracts, notional value	$ 67,181,000	$ 68,408,000
Derivative assets (liabilities), at fair value	(1,019,000)	(80,000)
Interest rate swap
Derivative [Line Items]
Derivative contracts, notional value	147,188,000	148,125,000
Derivative assets (liabilities), at fair value		(2,054,000)
Forward contracts to sell U.S. dollars
Derivative [Line Items]
Derivative contracts, notional value	65,449,000	66,951,000
Derivative assets (liabilities), at fair value	(990,000)	(85,000)
Forward contracts to purchase U.S. dollars
Derivative [Line Items]
Derivative contracts, notional value	1,732,000	1,457,000
Derivative assets (liabilities), at fair value	$ (29,000)	$ 5,000