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Equity-Based Compensation Equity-Based Compensation - Performance and Market Based RSUs (Details) - Performance and Market-based Restricted Stock Units
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Units  
Outstanding at beginning of year - shares | shares 249,560
Granted - shares | shares 108,650
Attained by performance - shares | shares 97,017
Vested and released - shares | shares (234,517)
Forfeited - shares | shares (9,000)
Outstanding at end of year - shares | shares 211,710
Maximum potential units outstanding at June 30, 2016 - shares | shares 423,420
Weighted Average Grant Date Fair Value  
Beginning of year - weighted average fair value | $ / shares $ 14.59
Granted - weighted average fair value | $ / shares 13.56
Attained by performance - weighted average fair value | $ / shares 10.48
Vested and released - weighted average fair value | $ / shares 10.52
Forfeited - weighted average fair value | $ / shares 14.41
End of year - weighted average fair value | $ / shares 16.58
Maximum potential units outstanding at June 30, 2016 - weighted average fair value | $ / shares $ 16.58