Retirement Plans And Postretirement Benefits (Fair Value Hierarchy, Assets At Fair Value) (Details) - Pension Plan [Member] - Fixed Insurance Contracts [Member] - Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Changes in Plan Assets:
Beginning Balance	$ 14,396	$ 12,787
Gain / contributions / currency impact	3,603	1,619
Distributions	(14)	(10)
Ending Balance	$ 17,985	$ 14,396