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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Deferred Tax Asset and Amount Due Pursuant to Tax Receivable Agreement        
Payment to eligible Managing Directors as a percentage of cash savings actually realized (as a percent)     85.00%  
Remaining percentage of cash savings realized by the Company (as a percent)     15.00%  
Revenue and Expense Recognition        
Reimbursable expenses billed to clients $ 2,793 $ 1,957 $ 7,520 $ 5,750
Income Taxes        
Unrecognized Tax Benefits $ 0 $ 0 $ 0 $ 0
Office Equipment And Furniture And Fixtures | Maximum
       
Equipment and leasehold improvements        
Useful lives     7 years  
Office Equipment And Furniture And Fixtures | Minimum
       
Equipment and leasehold improvements        
Useful lives     3 years