Stockholders' Equity (Details Textuals) (USD $) In Millions, except Share data	6 Months Ended
Jun. 30, 2011
Stockholders' Equity (Textuals) [Abstract]
Common stock, shares issued	19,000,000
Value of common stock issued	$ 220.4
Legal and accounting fees, filing fees, and other offering expenses	$ 0.6

Value of new stock issued during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

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