Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS (Narrative) (Details)

v3.8.0.1
ACQUISITIONS (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]        
Cash paid in acquisition   $ 231 $ 4,077 $ 0
Issuance of common stock in regard to acquisition   0 453 $ 0
Goodwill   298,528 $ 298,191  
ODCM        
Business Acquisition [Line Items]        
Assets under management $ 300,000      
Fair value of total consideration transferred 9,100      
Cash paid in acquisition 4,100      
Issuance of common stock in regard to acquisition $ 453      
Earn out provision 3 years      
Contingent consideration   $ 1,400    
Goodwill $ 4,700      
Business combination, finite-lived intangibles $ 4,500      
Minimum | ODCM        
Business Acquisition [Line Items]        
Intangible assets, amortization period   5 years    
Maximum | ODCM        
Business Acquisition [Line Items]        
Intangible assets, amortization period   10 years