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Equity-Based Compensation (Equity-Based Compensation Included In Compensation And Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Equity Based Compensation [Abstract]      
Equity-based compensation expense $ 1,189 $ 1,319 $ 1,947
Non equity-based compensation expense 26,839 28,445 45,220
Total compensation and benefits $ 28,028 $ 29,764 $ 47,167