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Employee Compensation and Benefit Plans - Schedule of Equity-based Compensation Expense Related to Stock Options and Stock Awards and Related Excess Tax Benefit (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Equity-based compensation expense:      
Awards $ 7,291 $ 10,729 $ 5,648
Excess tax benefit related to share-based awards 6,824 6,374 21,244
Stock Options [Member]      
Equity-based compensation expense:      
Awards 3,978 9,983 5,388
Stock Awards [Member]      
Equity-based compensation expense:      
Awards $ 3,313 $ 746 $ 260