Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Regulatory Capital Common Stock Issued (Details) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 18, 2013	Dec. 31, 2012	Sep. 30, 2012
Shares Issued [Abstract]
Common Stock, Shares, Issued	29,778,250	2,213,750	27,498,868	27,498,094
CommonStockIssuedOverAllotment		288,750
Shares Issued, Price Per Share		$ 26.00
Issuance of common stock, net of issuance costs		$ 53.9