Rialto Segment (Schedule of Credit Facilities) (Details) - Rialto	9 Months Ended
	Aug. 31, 2017 USD ($) extension	Oct. 10, 2017 USD ($)	Nov. 30, 2016 USD ($)
Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,050,000,000
364-day warehouse repurchase facility that matures October 2017 (1)
Line of Credit Facility [Line Items]
Term of note	364 days
364-day warehouse repurchase facility that matures January 2018
Line of Credit Facility [Line Items]
Term of note	364 days
Warehouse repurchase facility that matures August 2018 (two - one year extensions) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 100,000,000
Borrowings under the facilities	$ 34,400,000		$ 43,300,000
Number of extensions | extension	2
Extension term	1 year
Rialto Mortgage Finance | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 950,000,000
Rialto Mortgage Finance | 364-day warehouse repurchase facility that matures October 2017 (1) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	500,000,000
Rialto Mortgage Finance | 364-day warehouse repurchase facility that matures October 2017 (1) | Warehouse Repurchase Facility | Subsequent Event
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment		$ 400,000,000
Rialto Mortgage Finance | Warehouse repurchase facility that matures December 2017 | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	200,000,000
Rialto Mortgage Finance | 364-day warehouse repurchase facility that matures January 2018 | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 250,000,000