Residential Loans at Amortized Cost, Net Residential Loans at Amortized Cost, Net - Additional Information (Details)	6 Months Ended
Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum Period After Which Residential Loans Are Placed On Nonaccrual Status	90 days
Minimum Duration For Past Due Residential Loans To Be Considered As Non Performing	30 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration