Employee Benefit Plans, Noncontributory Defined Benefit Pension Plan (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Components of net periodic benefit cost [Abstract]
Service cost	$ 78	$ 82	$ 303	$ 247
Interest cost	55	83	215	249
Expected return on plan assets	(208)	(215)	(712)	(646)
Partial settlement	0	0	0	307
Net amortization and deferral	94	59	267	175
Net periodic benefit cost	19	$ 9	73	$ 332
Expected employer contribution to pension plan	$ 0		$ 0