Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 31, 2013
Subsequent Event [Line Items]
Membership interests	100.00%
Unsecured loan	$ 15
Servicer Advance Reimbursement Agreement [Member]
Subsequent Event [Line Items]
Additional master repurchase agreement aggregate capacity amount	950
Reimbursement Agreement expiration date	Dec. 31, 2013
Long-Term Debt [Member] | Incremental Secured Credit Facility [Member]
Subsequent Event [Line Items]
Borrowings under Incremental Secured Credit Facility	$ 50.0
Maximum [Member]
Subsequent Event [Line Items]
Purchase of common units	19.00%