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Equity-Based Compensation (Narrative) (Details)
shares in Millions, $ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
shares
Performance shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost | $ $ 4.1
Weighted average period (in years) 1 year 9 months 18 days
Restricted stock units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost | $ $ 1.2
Weighted average period (in years) 1 year 4 months 24 days
Total fair value of RSU awards vested | $ $ 0.2
2005 Stock Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares authorized 1.6
2014 Stock Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares authorized 1.0
2005 and 2014 Stock Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares authorized 1.1