Derivative Instruments (Schedule of Derivatives) (Details) - USD ($)	May 31, 2020	Nov. 30, 2019
Derivative [Line Items]
Notional Value	$ 66,206,000	$ 68,408,000
Fair Value	(1,295,000)	(80,000)
Interest rate swap contracts designated as cash flow hedges
Derivative [Line Items]
Notional Value	146,250,000	148,125,000
Fair Value	(7,686,000)	(2,054,000)
Forward contracts to sell U.S. dollars
Derivative [Line Items]
Notional Value	66,206,000	66,951,000
Fair Value	(1,295,000)	(85,000)
Forward contracts to purchase U.S. dollars
Derivative [Line Items]
Notional Value	0	1,457,000
Fair Value	$ 0	$ 5,000