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CONTINGENT LIABILITIES (Commitments) (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Jan. 31, 2008
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]        
Minimum future rentals under operating leases - 2018   $ 3.4    
Minimum future rentals under operating leases - 2019   2.6    
Minimum future rentals under operating leases - 2020   1.5    
Minimum future rentals under operating leases - 2021   0.9    
Minimum future rentals under operating leases - 2022   0.9    
Minimum future rentals under operating leases - 2023   0.9    
Leasing fees   3.2 $ 2.6 $ 2.5
Term of Frame Product and Service Purchase Agreement 10 years      
Term of any renewal period for Frame Product and Service Purchase Agreement 12 months      
Aggregate amount obligated to purchase from Telematics   $ 7.6