UNAUDITED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	9 Months Ended
Sep. 30, 2011
UNAUDITED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY [Abstract]
Sale of shares	984,848
Sale of shares, price per share	$ 13.20

The dollar amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant