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Consolidated Balance Sheets (Parenthetical) - ₪ / shares
shares in Thousands
Jun. 30, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Common stock, par value (in NIS per share) ₪ 0.01 ₪ 0.01
Common stock, shares authorized 180,000 180,000
Common stock, shares issued 52,854 52,639
Common stock, shares outstanding 52,854 52,639