Preferred Stock (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
Aug. 11, 2011	Sep. 30, 2015
Noncumulative Series E Preferred Stock [Member]
Temporary Equity [Line Items]
Dividend rate		1.00%
Series E Preferred Stock [Member]
Temporary Equity [Line Items]
Shares of stock issued	21,000
Value of stock issued	$ 21
Dividend rate		9.00%
Minimum Tier 1 capital required to pay dividends		90.00%
Redemption price, percent of liquidation amount		100.00%

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

Name:	us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration