Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Components of Net Periodic Benefit Cost
Service cost	$ 0	$ 0
Interest cost	58	51
Expected return on plan assets	(68)	(64)
Recognized loss due to settlement	26	25
Recognized net actuarial loss	65	68
Net periodic cost	$ 81	$ 80