Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets [Abstract]
Estimated future amortization expense in year 2019	$ 145,855
Estimated future amortization expense in year 2020	95,104
Estimated future amortization expense in year 2021	67,486
Estimated future amortization expense in year 2022	40,447
Estimated future amortization expense in year 2023	32,135
Estimated future amortization expense thereafter	113,756
Finite-Lived Intangible Assets, Net	494,783	$ 452,940
Amortization of Intangible Assets	$ 145,900	$ 129,000	$ 95,300