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ACQUISITIONS - Acquisition of Capstone Investment Management (Details) - USD ($)
$ in Thousands
9 Months Ended
May 01, 2017
Sep. 30, 2017
Sep. 30, 2016
ACQUISITIONS      
Cash paid for acquisitions, net   $ (2,845) $ 11,289
Capstone      
ACQUISITIONS      
Purchase price $ 1,750    
Cash paid for acquisitions, net 756    
Loan assumed $ 644    
Period over which remaining balance of loan assumed will be earned 2 years