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Employee Compensation and Benefit Plans - Schedule of Stock Options Vesting (Details)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Service Condition:    
Percent of Options Awarded 100.00% 100.00%
Service Condition Awards [Member]    
Service Condition:    
Percent of Options Awarded 35.00% 25.00%
Award vesting period 4 years 4 years
Vesting Period Ratably over four years (1/4 vesting on each of the four anniversaries of the grant date.) Ratably over four years (¼ on each of the four anniversaries of the grant date)
Performance Shares [Member]    
Service Condition:    
Percent of Options Awarded   50.00%
Award vesting period   3 years
Vesting Period   Over three years beginning with ¼ vesting on the date that the stock price has at least doubled over the exercise price and the compounded annual gain over the exercise price is at least 20% and then ratably over three years (¼ on the next three anniversaries of the achievement of the market condition)
Extraordinary Performance-based Awards [Member]    
Service Condition:    
Percent of Options Awarded   25.00%
Award vesting period   3 years
Vesting Period   Over three years beginning with ¼ vesting on the date that the stock price has at least tripled over the exercise price and the compounded annual gain over the exercise price is at least 25% and then ratably over three years (¼ on the next three anniversaries of the achievement of the market condition)
Restricted Stock [Member]    
Service Condition:    
Percent of Options Awarded 16.00%  
Award vesting period 4 years  
Vesting Period Over four years with 1/3 vesting on each of the 2nd, 3rd and 4th anniversaries of the grant date.  
Time-Based Vesting Schedule And Market Performance-Based Vesting Date [Member]    
Service Condition:    
Percent of Options Awarded 49.00%  
Award vesting period 4 years  
Vesting Period Vest over four years with 1/4 vesting on each of the four anniversaries of the grant date. However, none are considered vested until the first trading day (if any) on or before the 4th anniversary of the award date on which the average stock price equals or exceeds the price set in the individual award agreement, at which time all units that have met their time-based vesting schedule vest immediately with the remainder vesting in accordance with their time-based schedule.