Employee Benefit Plans Schedule Of Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Net loss	$ 898	$ 1,044	$ 1,143
Amortization of net loss	(1,021)	(1,197)	(1,228)
Total recognized in other comprehensive income	(123)	(153)	(85)
Total recognized in net periodic benefit cost and other comprehensive income	$ 46	$ 880	$ 767