Segment Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Segment Reporting Information [Line Items]
Interest expense	$ 21,512	$ 23,663	$ 64,226	$ 69,819
Reportable Segments | Merchant Banking
Segment Reporting Information [Line Items]
Interest expense	7,400	8,900	24,500	25,500
Parent Company interest
Segment Reporting Information [Line Items]
Interest expense	$ 14,100	$ 14,800	$ 39,800	$ 44,300