DEBT - Covenants and Terms (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Agency Warehouse Facility #1
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Maximum indebtedness to tangible net worth	2.25
Agency Warehouse Facility #2
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Agency Warehouse Facility #3
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Maximum indebtedness to tangible net worth	2.25
Agency Warehouse Facility #4
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Agency Warehouse Facility #5
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Interim Warehouse Facility #1
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Maximum indebtedness to tangible net worth	2.25
Mimimum rolling four-quarter EBITDA to total debt service ratio	2.00
Interim Warehouse Facility #2
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Debt covenant, aggregate minimum unpaid principal amount of all mortgage loans comprising the company's consolidated servicing portfolio	20,000.0
Debt covenant, aggregate minimum unpaid principal amount of all Fannie Mae DUS mortgage loans comprising the company's consolidated servicing portfolio	$ 10,000.0
Debt covenant, exclusion from servicing portfolio measure of loans past due period	60 days
Debt covenant, maximum percentage of Fannie Mae DUS loans 60 days past due to total servicing portfolio	3.50%
Maximum indebtedness to tangible net worth	2.25
Minimum EBITDA to be maintained under financial covenants	$ 35.0
Debt service coverage ratio	2.75
Interim Warehouse Facility #3
Warehouse notes payable
Minimum tangible net worth under covenant requirement	$ 200.0
Percentage of equity issued by the company or its subsidiaries added to base amount to determine compliance with tangible net worth covenants	75.00%
Minimum liquid asset to be maintained under financial covenants	$ 15.0
Maximum indebtedness to tangible net worth	3.00
Debt service coverage ratio	2.75