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New Accounting Pronouncements - Recently Issued (Details) - USD ($)
$ in Millions
9 Months Ended
Oct. 13, 2016
Feb. 19, 2015
Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle      
Gross proceeds from offering of common stock   $ 86.3  
Net proceeds from offering of common stock $ 48.9 $ 80.6  
Accounting Standards Update 2016-02 | Minimum      
New Accounting Pronouncements or Change in Accounting Principle      
Lease term     12 months