Rialto Investments Segment (Operating Earnings By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015		Feb. 28, 2014
Segment Reporting Information [Line Items]
Operating earnings (loss)	$ 220,297		$ 163,988
Noncontrolling interest income (loss)	1,954		1,848
Rialto [Member]
Segment Reporting Information [Line Items]
Rialto, Revenues	41,197		46,955
Rialto, Cost and expenses	40,781	[1]	47,576	[1]
Equity in earnings (loss) from unconsolidated entities	2,664		5,354
Rialto other income (expense), net	(272)		(1,229)
Operating earnings (loss)	2,808	[2]	3,504	[2]
Loan impairments	1,224		6,717
Noncontrolling interest income (loss)	$ (1,814)		$ 935

[1] Costs and expenses for the three months ended February 28, 2015 and 2014 included loan impairments of $1.2 million and $6.7 million, respectively, primarily associated with the segment's FDIC loans portfolio (before noncontrolling interests).

[2] Operating earnings for the three months ended February 28, 2015 and 2014 included net earnings (loss) attributable to noncontrolling interests of ($1.8) million and $0.9 million, respectively.