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Schedule of Estimated Amortization Expense, Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]      
2017 $ 245    
2018 245    
2019 240    
2020 236    
2021 236    
Thereafter 483    
Total $ 1,685 $ 1,945 $ 5,220