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CONVERTIBLE SENIOR NOTES, NET (Schedule of Interest Expense Related to Notes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Debt Disclosure [Abstract]      
Amortization of debt discount $ 1,713    
Amortization of debt issuance costs 253    
Total interest expense recognized $ 1,966