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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Schedule of Other Receivables and Prepaid Expenses) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Prepaid Expense and Other Assets [Abstract]    
Government authorities $ 30,369 $ 26,275
Interest receivable 2,867 2,042
Prepaid expenses 45,671 31,810
Inventories 3,434 3,891
Discontinued operations 2,042
Other 5,109 4,014
Prepaid expenses and other current assets $ 87,450 $ 70,074