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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill beginning balance $ 111,387
Goodwill recognized upon acquisition 4,826
Adjustment to goodwill associated with acquisitions (176)
Foreign exchange adjustment to goodwill (80)
Goodwill ending balance $ 115,957