Annual report pursuant to Section 13 and 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
segments
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Business Acquisition [Line Items]      
Number of Reportable Segments | segments 4    
Goodwill $ 1,993,000 $ 1,993,000 $ 677,000
Other intangible assets 346,000 402,000  
Goodwill acquired during the period   $ 1,321,000  
Impairment of goodwill $ 0