Rialto Investments Segment (Condensed Financial Information By Equity Method Investment) (Details) (Rialto [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015		Feb. 28, 2014		Nov. 30, 2014
Rialto [Member]
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 77,844				$ 141,609
Loans receivable	515,229				512,034
Real estate owned	442,258				378,702
Investment securities	859,117				795,306
Investments in partnerships	345,752				311,037
Other assets	30,456				45,451
Total assets	2,270,656				2,184,139
Accounts payable and other liabilities	15,846				20,573
Notes payable	407,446				395,654
Equity	1,847,364				1,767,912
Total liabilities and equity	2,270,656				2,184,139
Revenues	41,738		31,427
Costs and expenses	23,005		26,109
Other income, net	5,874	[1]	48,170	[1]
Net earnings (loss) of unconsolidated entities	24,607		53,488
Equity in earnings (loss) from unconsolidated entities	$ 2,664		$ 5,354

[1] (1)Other income, net, for the three months ended February 28, 2015 and 2014 included realized and unrealized gains (losses) on investments.In 2010, the Rialto segment invested in non-investment grade commercial mortgage-backed securities (“CMBS”) at a 55% discount to par value. The carrying value of the investment securities at February 28, 2015 and November 30, 2014 was $17.6 million and $17.3 million, respectively. These securities bear interest at a coupon rate of 4% and have a stated and assumed final distribution date of November 2020 and a stated maturity date of October 2057. The Rialto segment reviews changes in estimated cash flows periodically to determine if other-than-temporary impairment has occurred on its investment securities. Based on the Rialto segment’s assessment, no impairment charges were recorded during both the three months ended February 28, 2015 and 2014. The Rialto segment classified these securities as held-to-maturity based on its intent and ability to hold the securities until maturity.In December 2014, the Rialto segment invested in a private commercial real estate services company at a price of $18.0 million. The investment is carried at cost at February 28, 2015 and is included in Rialto's other assets.