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Employee Benefits (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Employee Benefits and Share-based Compensation, Noncash [Abstract]    
Projected and accumulated benefit obligation $ (18,298) $ (18,241)
Plan assets at fair value 18,704 17,459
Funded status included in other liabilities $ 406 $ (782)