Employee Benefit Plans, Noncontributory Defined Benefit Pension Plan (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Components of net periodic benefit cost [Abstract]
Service cost	$ 83	$ 89
Interest cost	87	139
Expected return on plan assets	(225)	(205)
Net amortization and deferral	62	61
Net periodic benefit cost	7	$ 84
Expected employer contribution to pension plan	$ 0