Income Taxes (Interest And Penalties) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 16,348	$ 15,356
Interest and penalties on unrecognized benefits	2,212	1,962
Total gross uncertain tax positions	18,560	17,318
Amount included in Current liabilities	3,986	4,896
Amount included in Other long-term liabilities	$ 14,574	$ 12,422