Employee Benefit Plans (Pension and Other Postretirement Benefits) (Details) - 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 cost:
Interest cost	$ 83	$ 112	$ 166	$ 224
Expected return on plan assets	(205)	(203)	(410)	(406)
Net amortization and deferral	280	272	561	544
Net Periodic Pension Cost	$ 158	$ 181	$ 317	$ 362