Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets [Abstract]
Estimated future amortization expense in year 2020	$ 156,283
Estimated future amortization expense in year 2021	115,875
Estimated future amortization expense in year 2022	71,835
Estimated future amortization expense in year 2023	54,246
Estimated future amortization expense in year 2024	34,556
Estimated future amortization expense thereafter	92,073
Finite-Lived Intangible Assets, Net	524,868	$ 494,783
Amortization of Intangible Assets	$ 180,600	$ 145,900	$ 129,000