Goodwill And Other Intangible Assets (Schedule Of Amortization Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill And Other Intangible Assets [Abstract]
Amortization of intangible assets	$ 9,485	$ 10,065	$ 11,838
Amortization of capitalized purchased software costs	1,198	1,078	1,147
Amortization of debt costs	2,717	861	756
Total amortization	$ 13,400	$ 12,004	$ 13,741