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Commitments and Contingencies (Minimum Future Rental Payments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies [Abstract]      
2016 $ 1,374    
2017 619    
2018 120    
Thereafter 90    
Total 2,203    
Aggregate office rent expenses $ 966 $ 845 $ 1,002