Rialto Segment (Schedule of Credit Facilities) (Details) - Rialto [Member] - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2016	Nov. 30, 2015
Line of Credit Facility [Line Items]
Borrowings under the facilities	$ 146,276	$ 317,104
Line of credit facility, maximum borrowing capacity	1,100,000
Warehouse Repurchase Facility One [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 400,000
Line of credit facility, term	364 days
Warehouse Repurchase Facility Five [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000
Warehouse Repurchase Facility Two [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 250,000
Line of credit facility, term	364 days
Warehouse Repurchase Facility Three [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 250,000
Line of credit facility, term	364 days
Warehouse Repurchase Facility Four [Member]
Line of Credit Facility [Line Items]
Borrowings under the facilities	$ 41,550	$ 36,300
Line of credit facility, maximum borrowing capacity	$ 100,000