Rialto Segment (Schedule of Credit Facilities) (Details) - Rialto	12 Months Ended
	Nov. 30, 2017 USD ($) extension	Jan. 19, 2018 USD ($)	Nov. 30, 2016 USD ($)
Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,150,000,000
Warehouse repurchase facility that matures December 2017 (1) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 200,000,000
364-day warehouse repurchase facility that matures January 2018 (2)
Line of Credit Facility [Line Items]
Warehouse repurchase facility term	364 days
364-day warehouse repurchase facility that matures January 2018 (2) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 250,000,000
364-day warehouse repurchase facility that matures October 2018
Line of Credit Facility [Line Items]
Warehouse repurchase facility term	364 days
364-day warehouse repurchase facility that matures October 2018 | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 400,000,000
364-day warehouse repurchase facility that matures November 2018 (one year extension)
Line of Credit Facility [Line Items]
Warehouse repurchase facility term	364 days
364-day warehouse repurchase facility that matures November 2018 (one year extension) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 200,000,000
Warehouse repurchase facility extension term	1 year
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
Warehouse repurchase facility extension term	1 year
Warehouse repurchase facility number of extensions | extension	2
Borrowings under facility	$ 0		$ 43,300,000
Rialto Mortgage Finance | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,050,000,000
Subsequent Event | 364-day warehouse repurchase facility that matures January 2018 (2) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment		$ 200,000,000