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Equity-Based Compensation Equity-Based Compensation - Performance and Market Based RSUs (Details) - $ / shares
9 Months Ended
Sep. 30, 2019
Feb. 07, 2019
Performance Goal [Member]    
Units    
Target Units Outstanding   6,945
Shared Based Compensation Maximum Potential Awards   13,890
Performance and Market-based Restricted Stock Units    
Units    
Outstanding at beginning of year - shares 267,792  
Granted - shares 82,103  
Attained by performance - shares 60,779  
Vested and released - shares (160,889)  
Forfeited - shares (26,156)  
Outstanding at end of year - shares 223,629  
Maximum potential units outstanding at June 30, 2016 - shares 0  
Weighted Average Grant Date Fair Value    
Beginning of year - weighted average fair value $ 21.44  
Granted - weighted average fair value 30.98  
Attained by performance - weighted average fair value 13.54  
Vested and released - weighted average fair value 14.34  
Forfeited - weighted average fair value 23.81  
End of year - weighted average fair value 27.70  
Maximum potential units outstanding at June 30, 2016 - weighted average fair value $ 0