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Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended			1 Months Ended
	Jul. 16, 2014 Subsequent Event	Jul. 16, 2014 Subsequent Event	Jun. 30, 2014 Residential Loans	Aug. 02, 2014 Residential Loans Subsequent Event
Subsequent Event [Line Items]
Amount of loans planned to be purchased			$ 1,600,000,000
Residential mortgage loans closed and purchased				643,000,000
Variable-rate advances outstanding amount		$ 26,000,000
Weighted average interest rate		0.186%
Weighted average maturity	2 years

X

- Definition

Amount of Loans Expected to be Purchased

+ References

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- Definition

Federal Home Loan Bank Advances General Debt Obligations Disclosure Weighted Average Maturity Period

+ References

No definition available.

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X

- Definition

Amount of the collateral pledged in support of federal home loan bank advances outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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- Definition

States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.

+ References

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

-Publisher SEC

-Name Industry Guide

-Number 3

-Section VII

-Subsection 1

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X

- Definition

The cash outflow used to purchase loans that are secured with real estate mortgage and are held with the intention to resell in the near future.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 21

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3461-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 230

-Section 55

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6587932&loc=d3e60097-112785



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3367-108585

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