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Retirement Plan (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Periodic Pension Cost [Line Items]      
Service cost $ 0 $ 0 $ 0
Interest cost 61 64 39
Expected return on plan assets (54) (52) (44)
Net amortization 59 74 58
Net periodic pension cost $ 66 $ 86 $ 53