Goodwill And Other Intangible Assets (Schedule Of Amortization Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Other Intangible Assets [Abstract]
Amortization of intangible assets	$ 9,461	$ 9,485	$ 10,065
Amortization of capitalized purchased software costs	1,393	1,198	1,078
Amortization of debt costs	461	2,717	861
Total amortization	$ 11,315	$ 13,400	$ 12,004