Employee Benefits (Details 1) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Interest cost	$ 185	$ 689
Expected return on plan assets	235	(1,074)
Amortization of unrecognized loss	90	374
Net periodic cost (benefit)	$ 510	$ (11)