Rialto Segment (Schedule of Credit Facilities) (Details) - Rialto	3 Months Ended
	Feb. 28, 2018 USD ($) extension
Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,100,000,000
364-day warehouse repurchase facility that matures October 2018 (one year extension)
Line of Credit Facility [Line Items]
Term of note	364 days
364-day warehouse repurchase facility that matures October 2018 (one year extension) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Extension term	1 year
364-day warehouse repurchase facility that matures November 2018
Line of Credit Facility [Line Items]
Term of note	364 days
364-day warehouse repurchase facility that matures November 2018 | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 200,000,000
364-day warehouse repurchase facility that matures December 2018
Line of Credit Facility [Line Items]
Term of note	364 days
364-day warehouse repurchase facility that matures December 2019
Line of Credit Facility [Line Items]
Term of note	364 days
Warehouse repurchase facility that matures August 2018 (two - one year extensions) (1) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 100,000,000
Number of extensions | extension	2
Extension term	1 year
Rialto Mortgage Finance | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,000,000,000
Rialto Mortgage Finance | 364-day warehouse repurchase facility that matures October 2018 (one year extension) | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	400,000,000
Rialto Mortgage Finance | 364-day warehouse repurchase facility that matures December 2018 | 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 December 2019 | Warehouse Repurchase Facility
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 200,000,000