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Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Loss Contingencies [Line Items]    
Rent expense $ 0.9 $ 0.8
Minimum [Member]    
Loss Contingencies [Line Items]    
Lease interest rate 6.60%  
Maximum [Member]    
Loss Contingencies [Line Items]    
Lease interest rate 9.60%