Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND GOODWILL - Narrative (Details)

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ACQUISITIONS AND GOODWILL - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisitions and Goodwill [Abstract]      
Goodwill $ 32,962 $ 32,962 $ 32,962