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BUSINESS COMBINATION, SIGNIFICANT TRANSACTION AND SALE OF BUSINESS (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jul. 11, 2016
Apr. 14, 2015
Oct. 31, 2016
Jul. 31, 2016
Jan. 31, 2016
Jun. 30, 2015
Oct. 01, 2014
Dec. 31, 2016
Dec. 31, 2015
Jul. 06, 2016
 [1]
Dec. 31, 2014
Business Acquisition [Line Items]                      
Business Combination, Consideration Transferred, Total         $ 356            
Redeemable Noncontrolling Interest, Equity, Carrying Amount               $ 25,998 $ 5,745   $ 5,745
Formula Telecom Solutions Ltd [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Consideration Transferred, Total             $ 5,800        
Comblack IT Ltd. [Member]                      
Business Acquisition [Line Items]                      
Business Combination Consideration Paid Transferred1   $ 1,821                  
Payments to Acquire Businesses, Gross   1,523                  
Contingent Payment Upon Operational Targets   $ 298                  
Business Acquisition, Remaining Ownership Percentage   30.00%                  
Business Acquisition, Percentage of Voting Interests Acquired   70.00%                  
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value   $ 989                  
Redeemable Noncontrolling Interest, Equity, Carrying Amount               3,875      
Infinigy Solutions LLC [Member]                      
Business Acquisition [Line Items]                      
Business Combination Consideration Paid Transferred1           $ 6,527          
Payments to Acquire Businesses, Gross       $ 534   5,600          
Contingent Payment Upon Operational Targets           $ 927          
Business Acquisition, Remaining Ownership Percentage           30.00%          
Business Acquisition, Percentage of Voting Interests Acquired           70.00%          
Business Combination, Contingent Consideration, Liability, Noncurrent               685      
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value           $ 3,590          
Redeemable Noncontrolling Interest, Equity, Carrying Amount               3,971      
Roshtov Software Industries Ltd [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Consideration Transferred, Total $ 20,550                    
Business Acquisition, Remaining Ownership Percentage 40.00%                    
Business Acquisition, Percentage of Voting Interests Acquired 60.00%                    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value $ 14,012                 $ 14,012  
Redeemable Noncontrolling Interest, Equity, Carrying Amount               14,703      
Shavit Software 2009 Ltd [Member]                      
Business Acquisition [Line Items]                      
Business Acquisition Contingent Consideration Deferred Payment     $ 1,633                
Business Combination, Consideration Transferred, Total     6,836                
Payments to Acquire Businesses, Gross     4,699                
Contingent Payment Upon Operational Targets     $ 504                
Business Acquisition, Percentage of Voting Interests Acquired     100.00%                
Comm IT Embedded Ltd [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Consideration Transferred, Total                 1,412    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value [1]               $ 1,209      
Increase Share Interest               50.1% to 75%      
Complete Business Solutions Ltd [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Consideration Transferred, Total               $ 244      
Increase Share Interest               96.3% to 100%      
Addition Acquisition [Member]                      
Business Acquisition [Line Items]                      
Business Combination Consideration Paid Transferred1               $ 8,884 $ 1,892    
[1] The estimated fair values of the tangible and intangible assets are provisional and are based on information that was available as of the acquisition date to estimate the fair value of these amounts. The Company's management believes the information provides a reasonable basis for estimating the fair values of these amounts, but is waiting for additional information necessary to finalize those fair values. Therefore, provisional measurements of fair value reflected are subject to change. The Company expects to finalize the tangible and intangible assets valuation and complete the acquisition accounting as soon as practicable but no later than the measurement period.