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Shareholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
 12 Months Ended 16 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
Dec. 31, 2009
USD ($)
shares
Dec. 31, 2016
₪ / 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 $ 0.27 $ 0.30 $ 0.24      
Compensation costs $ 137 $ 138 $ 72      
Total unrecognized compensation costs $ 525          
Total compensation cost not yet recognized, weighted average period for recognition 1 year 8 months 12 days          
Exercise of options issued to employees from treasury shares $ 85 $ 171 424      
Treasury shares | shares 2,398,592 2,457,592        
Total intrinsic value of options exercised $ 51 $ 176 $ 322      
Aggregate intrinsic value of the outstanding options 966          
Aggregate intrinsic value of the exercisable options $ 6          
Minimum [Member]            
Shareholders' Equity (Textual)            
Outstanding options granted, vesting period 3 years          
Options not exercised, expiration period after the day of grant 5 years          
Maximum [Member]            
Shareholders' Equity (Textual)            
Outstanding options granted, vesting period 5 years          
Options not exercised, expiration period after the day of grant 7 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 ₪ 0.01
Options granted exercise price of ordinary shares, description 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 trading day period immediately preceding the date of grant of such option or with an exercise price equal to par value of NIS 0.01.