v2.4.0.6
Subsequent Events (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Oct. 03, 2012
Issuance of Equity [Member]
Subsequent Event [Member]
Sep. 30, 2012
Common Stock [Member]
Sep. 30, 2012
Convertible Preferred Stock [Member]
Oct. 03, 2012
IPO [Member]
Common Stock [Member]
Issuance of Equity [Member]
Subsequent Event [Member]
Oct. 03, 2012
IPO [Member]
Convertible Preferred Stock [Member]
Issuance of Equity [Member]
Subsequent Event [Member]
Oct. 03, 2012
IPO Overallotment [Member]
Common Stock [Member]
Issuance of Equity [Member]
Subsequent Event [Member]
Subsequent Event [Line Items]                
Shares Sold in Initial Public Offering, Including Existing Shares           8,711,250    
Shares sold in initial public offering, including existing shares, price per share           $ 12.00    
Shares issued during period       724,458   7,836,250   1,136,250
Shares Sold by Existing Stockholders During Initial Public Offering           875,000    
Proceeds from Issuance Initial Public Offering     $ 87.5          
Payments of Stock Issuance Costs     $ (2.5)          
Conversion of stock, shares converted             17,597,258  
Common Stock, Shares Authorized 299,900,000 299,900,000 1,000,000,000          
Preferred Stock, Shares Authorized     20,000,000   176,400,000