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STOCKHOLDERS' EQUITY (Narrative) (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended | 13 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 21, 2012 | Feb. 28, 2018 USD ($) | Feb. 27, 2017 USD ($) | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 USD ($) shares | Dec. 31, 2015 USD ($) shares | Jan. 31, 2018 USD ($) | Jan. 31, 2017 USD ($) | Jan. 31, 2016 USD ($) | Feb. 28, 2018 ₪ / shares
Treasury stock acquired | shares |  |  |  | 2,507,314 | 2,507,314 | 2,507,314 |  |  |  |
Percentage of outstanding stock in treasury stock |  |  |  | 10.70% | 10.70% | 10.70% |  |  |  |
Dividend rate as a percentage of net profits | 50.00% |  |  |  |  |  |  |  |  |
Dividend paid |  |  | $ 5,000 | $ 18,452 | $ 13,968 | $ 13,171 |  | $ 18,200 | $ 16,300 |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Dividend paid |  | $ 5,000 |  |  |  |  | $ 23,500 |  |  |
Cash dividend declared, value per share | ₪ / shares |  |  |  |  |  |  |  |  |  | ₪ 0.24
Dividends payable date |  |  |  |  |  |  |  |  |  | 2018-04

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