Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND RECENT TRANSACTIONS (Details 2) (Parenthetical)

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ACQUISITIONS AND RECENT TRANSACTIONS (Details 2) (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]    
Allowance for Doubtful Accounts Receivable, Current $ 11,019 $ 10,420
Allowance for Trade Receivables [Member]    
Business Acquisition [Line Items]    
Allowance for Doubtful Accounts Receivable, Current   $ 42