Goodwill And Other Intangible Assets (Schedule Of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Goodwill And Other Intangible Assets [Abstract]
Amortization of intangible assets	$ 2,366	$ 2,481
Amortization of capitalized purchased software costs	259	276
Amortization of debt costs	218	196
Total amortization	$ 2,843	$ 2,953