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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Loss [Abstract]    
Net unrealized gains (losses) on securities $ 901 $ (20)
Tax effect (306) 7
Net of tax amount 595 (13)
Accumulated pension adjustment (6,366) (6,366)
Tax effect 2,164 2,164
Net of tax amount (4,202) (4,202)
Total accumulated other comprehensive loss $ (3,607) $ (4,215)