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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]        
Reclassification Of Warrant Liability Upon Exercise $ (10,843) $ (14,249) $ 10,843   
Tax on unrealized gain on marketable securities   0 1,052 0
Tax effect of reclassification of unrealized gain upon sale of marketable securities   $ 1,052 $ 0 $ 0