Total amount of additions to mortgage loans other than new loans during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29.6)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

Name:	us-gaap_MortgageLoansOnRealEstateOtherAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Loan Repurchase Facility (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended				3 Months Ended	9 Months Ended
	Aug. 28, 2013	Jul. 25, 2013	May 31, 2013	Mar. 22, 2013	Sep. 30, 2013	Sep. 30, 2013
Line of Credit Facility [Line Items]
Unpaid principal balance of loans acquired	$ 98.2	$ 162.4	$ 134.5	$ 17.7	$ 260.6	$ 412.9
Loan Repurchase Facility [Member]
Line of Credit Facility [Line Items]
Term of facility						364 days