Subsequent Events - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 02, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2015	Dec. 01, 2015	Oct. 20, 2015	Oct. 16, 2015	Jan. 05, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Restricted cash received from WMMRC			$ 582,374,000	$ 582,374,000					$ 2,447,000
WMMRC [Member]
Subsequent Event [Line Items]
Litigation settlement amount				37,000,000
Litigation settlement reserve for reimbursement of contingent fees and expenses			3,000,000	3,000,000				$ 3,000,000
Proceeds from litigation settlement amount	$ 9,000,000
WMMRC [Member] | Maximum [Member]
Subsequent Event [Line Items]
Restricted cash received from WMMRC			1,000	1,000
WMI Holdings Corp [Member]
Subsequent Event [Line Items]
Litigation settlement amount				123,000
Litigation settlement reserve for reimbursement of contingent fees and expenses			500,000	500,000
Proceeds from litigation settlement amount		$ 8,300,000
Accrued legal expense			600,000	600,000
Other expenses			$ 477,000
Other income				$ 7,800,000
Scenario, Forecast [Member] | Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Notes payable - principal					$ 21,700,000
Subsequent Event [Member] | Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Repayment of notes payable-principal						$ 7,100,000
Subsequent Event [Member] | WMMRC [Member]
Subsequent Event [Line Items]
Restricted cash received from WMMRC							$ 8,000,000
Subsequent Event [Member] | WMI Holdings Corp [Member] | Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Repayment of notes payable-interest						$ 900,000