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Mezzanine Equity - Narrative (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended
Jul. 14, 2014
Sep. 30, 2014
Sep. 30, 2013
Jul. 14, 2014
Temporary Equity [Line Items]        
Number of preferred shares to be converted (in shares)       62,000
Shares issued (in shares) 1,950,296      
Accelerated write-off of unamortized discount   $ 0.8 $ 3.5