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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Guarantor Obligations [Line Items]      
Rent expenses $ 2,568 $ 2,548 $ 2,966
Outstanding inventory purchase commitments 13,494 14,213  
Inventory purchase commitments, sole or limited suppliers 5,530 3,789  
Amount of claim, including interest, penalties and legal fees 10,100    
Principal Amount of Claim 1,200    
Aggregate amount of guarantees 139,676    
Restricted cash collateral 24,143    
Peru [Member]      
Guarantor Obligations [Line Items]      
Aggregate amount of guarantees $ 135,844    
OCS [Member]      
Guarantor Obligations [Line Items]      
Percentage of amount funded for research and development projects 100.00%    
Accrued royalties $ 1,237 749  
OCS [Member] | Minimum [Member]      
Guarantor Obligations [Line Items]      
Royalty fee (as a percent) 3.00%    
OCS [Member] | Maximum [Member]      
Guarantor Obligations [Line Items]      
Royalty fee (as a percent) 5.00%    
BIRD [Member]      
Guarantor Obligations [Line Items]      
Royalty fee (as a percent) 5.00%    
Percentage of amount funded for research and development projects 150.00%    
Accrued royalties $ 121 121  
Spacenet Inc. [Member]      
Guarantor Obligations [Line Items]      
Service expenses $ 10,278 $ 8,333 $ 7,913