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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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The dividend rate as a percentage of net profits

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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Date the declared dividend will be paid, in CCYY-MM format.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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