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Equity Based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Award vesting period (years)   5 years  
Total unrecognized compensation costs $ 1.1 $ 1.1  
Weighted average period of recognition (years)   2 years 5 months  
Selling, General and Administrative Expenses [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Unit-based compensation expense $ 0.1 $ 0.2 $ 0.1