Mezzanine Equity - Schedule of Carrying Value of Preferred Shares (Footnote) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
---|---|---|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
Temporary Equity Disclosure [Abstract] | ||
Accelerated write-off of unamortized discount | $ 0.8 | $ 3.5 |