Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Impairment Loss	$ 0	$ 0
Amortization expense of intangible assets	12,200	$ 12,900	$ 13,600
Future Amortization Expense, 2020	11,400
Future Amortization Expense, 2021	10,700
Future Amortization Expense, 2022	10,100
Future Amortization Expense, 2023	9,200
Future Amortization Expense, 2024	$ 8,000