Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v2.4.0.6
Subsequent Events (Details) (USD $)
0 Months Ended 3 Months Ended 6 Months Ended
Feb. 24, 2012
Jan. 17, 2012
Sep. 30, 2012
Jun. 30, 2012
Jun. 30, 2011
Jul. 18, 2012
Dec. 31, 2011
Subsequent Event [Line Items]              
Common Stock, Shares, Issued 30,000,000 34,000,000   214,207,346   50,000,000 140,596,708
Common Stock, Shares, Issued Pursuant to the Underwriters' Over-allotments 4,500,000 5,100,000       7,500,000  
Sale of Stock, Price Per Share $ 9.90 $ 9.17       $ 10.44  
Proceeds from Issuance of Common Stock $ 341,600,000 $ 358,500,000 $ 600,300,000 $ 769,812,000 $ 523,076,000    
Proceeds from Issuance of Common Stock, Net     592,400,000 691,900,000      
Payments of Stock Issuance Costs     $ 7,900,000 $ 8,200,000