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Shareholders' Equity (Details Textual) $ / shares in Units, $ in Thousands | 12 Months Ended | 16 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2009 USD ($) shares | Dec. 31, 2011 ₪ / shares shares
Shareholders' Equity (Textual) |  |  |  |  |
Purchased an aggregate amount of ordinary shares | shares |  |  |  | 3,165,092 |
Total consideration |  |  |  | $ 2,800 |
Dividends paid per share | $ / shares | $ 0.30 | $ 0.32 | $ 0.27 |  |
Compensation costs | $ 224 | $ 182 | $ 137 |  |
Total unrecognized compensation costs | $ 422 |  |  |  |
Total compensation cost not yet recognized, weighted average period for recognition | 1 year 5 months 9 days |  |  |  |
Exercise of options issued to employees from treasury shares | $ 39 | $ 53 | 85 |  |
Treasury shares | shares | 2,220,792 | 2,352,592 |  |  |
Treasury value | $ 1,515 | $ 1,554 |  |  |
Total intrinsic value of options exercised | 226 | 70 | 51 |  |
Aggregate intrinsic value of the outstanding options | $ 738 |  |  |  |
Options not exercised, expiration period after the day of grant | 5 years |  |  |  |
Aggregate intrinsic value of the exercisable options | $ 84 |  |  |  |
Paid dividends to shareholders | $ 5,800 | $ 6,200 | $ 5,200 |  |
Minimum [Member] |  |  |  |  |
Shareholders' Equity (Textual) |  |  |  |  |
Outstanding options granted, vesting period | 2 years |  |  |  |
Maximum [Member] |  |  |  |  |
Shareholders' Equity (Textual) |  |  |  |  |
Outstanding options granted, vesting period | 4 years |  |  |  |
2011 Share Incentive Plan [Member] |  |  |  |  |
Shareholders' Equity (Textual) |  |  |  |  |
Options for ordinary shares | shares |  |  |  |  | 1,800,000
Par value granted to employees | ₪ / shares |  |  |  |  | ₪ 0.01
Options granted exercise price of ordinary shares, description | The options were granted with an exercise price equal to NIS 0.01. | The options were granted with an exercise price equal to the average closing price per share of the Company's ordinary shares on the stock market during the 30-day trading period immediately preceding the date of grant of such option, or with an exercise price equal to par value of NIS 0.01. | The options were granted with an exercise price equal to par value of NIS 0.01. |  |

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