Employee Benefit Plans, Noncontributory Defined Benefit Pension Plan (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Components of net periodic benefit cost [Abstract]
Service cost	$ 110	$ 83
Interest cost	82	87
Expected return on plan assets	(252)	(225)
Net amortization and deferral	91	62
Net periodic benefit cost	31	$ 7
Expected employer contribution to pension plan	$ 0