Employee Benefit Plans, Noncontributory Defined Benefit Pension Plan (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Components of net periodic benefit cost [Abstract]
Service cost	$ 115	$ 82	$ 225	$ 165
Interest cost	78	79	160	166
Expected return on plan assets	(252)	(206)	(504)	(431)
Partial settlement	0	307	0	307
Net amortization and deferral	82	55	173	117
Net periodic benefit cost	23	$ 317	54	$ 324
Expected employer contribution to pension plan	$ 0		$ 0