Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Warrants (Details)

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Stockholders' Equity Warrants (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2013
Apr. 02, 2013
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Class of Warrant or Right [Line Items]            
Warrants Exercised During Period   (8,720,690) (1,130,460)      
Class of Warrant or Right, Exercise Price of Warrants or Rights 10.25 10.25 10.25 10.25   11.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   1.0727        
Stock Issued During Period, Shares, Conversion of Convertible Securities   8,720,690 1,212,607      
Proceeds from issuance of common stock in connection with exercise of warrants       $ 107,514 $ 213,593  
Cashless Warrants Exercised During Period       (100,000)    
Stock Issued During Period, Shares, Cashless Exercise of Warrants, Forfeited       (93,649)    
Stock Issued During Period, Shares, Cashless Exercise of Warrant       6,351    
Warrants Expired During Period (3,580,279)