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SHAREHOLDERS' EQUITY (Stock Option Plans TAT Technology) (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 28, 2012
₪ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2017
₪ / shares
Oct. 30, 2017
$ / shares
shares
Aug. 10, 2017
$ / shares
shares
Mar. 06, 2017
$ / shares
shares
Dec. 31, 2016
₪ / shares
Dec. 28, 2016
$ / shares
shares
Nov. 03, 2016
$ / shares
shares
Jun. 23, 2016
$ / shares
shares
Mar. 29, 2016
$ / shares
shares
Oct. 01, 2015
$ / shares
shares
Jul. 01, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Ordinary shares, par value per share | ₪ / shares           ₪ 0.9       ₪ 0.9            
Number of options                                
Options, beginning     330,000 277,500 235,000                      
Options, Granted     75,000 250,000 120,000                      
Options, Forfeited     (54,375) (177,400) (77,500)                      
Options, Exercised     (19,583) (20,100)                        
Options, ending     331,042 330,000 277,500                      
Exercisable at end of year     120,417 20,000 30,000                      
Weighted average exercise price                                
Options, beginning | $ / shares     $ 7.97 $ 7.60 $ 8.28                      
Options, Granted | $ / shares     10.39 8.10 7.15                      
Options, Forfeited | $ / shares     8.35 7.56 8.67                      
Options, Exercised | $ / shares     7.3 6.50                      
Options, ending | $ / shares     9.03 7.97 7.60                      
Exercisable at end of year | $ / shares     7.95 7.15 6.50                      
Weighted-average grant-date fair value of options granted | $ / shares     $ 1.74 $ 1.42 $ 1.25                      
2012 Plan [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Number of shares authorized for the plan   380,000         80,000 45,000 30,000   60,000 50,000 100,000 40,000 40,000 80,000
Vesting period for plan 3 years 4 years                            
Ordinary shares, par value per share | ₪ / shares   ₪ 0.9                            
Exercise price | $ / shares             $ 11.54 $ 11.39 $ 8.9   $ 10 $ 7.34 $ 7.54 $ 7.63 $ 7.15 $ 7.15
Dividend yield     5.00% 5.00% 5.00%                      
Weighted average exercise price                                
Aggregate intrinsic value | $     $ 737 $ 332 $ 27                      
Unrecognized compensation cost related to non-vested stock options | $     $ 335                          
Unrecognized compensation weighted average period of recognition, years     1 year 2 months 5 days                          
Period in which equity exceeds threshold 4 years                              
2012 Plan [Member] | Minimum [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Number of shares authorized for the plan   300,000                            
Expected stock price volatility     33.30% 37.70% 35.07%                      
Expected option life (in years)     4 years 3 years 3 years                      
Risk free interest rate     1.49% 0.92% 0.92%                      
2012 Plan [Member] | Maximum [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Number of shares authorized for the plan   680,000                            
Expected stock price volatility     40.50% 40.30% 38.97%                      
Expected option life (in years)     5 years 6 months 5 years 6 months 4 years                      
Risk free interest rate     1.81% 1.79% 1.39%                      
2012 Plan [Member] | Vest upon the lapse of 12 months [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting percentage   25.00%                            
2012 Plan [Member] | Vest on a quarterly basis [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period for plan   3 years                            
Vesting percentage   75.00%