Goodwill and Other Intangible Assets (Goodwill And Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, Gross, beginning balance	$ 1,900,727	$ 1,900,727
Accumulated impairment loss, beginning balance	(1,898,012)	(113,076)
Goodwill, Total, beginning balance	2,715	1,787,651
Goodwill, Written off Related to Sale of Business Unit	2,715	0
Goodwill impairment	0	(1,784,936)	$ 0
Goodwill, Other Increase (Decrease)	0
Goodwill, Gross, ending balance	1,898,012	1,900,727	1,900,727
Accumulated impairment loss, ending balance	(1,898,012)	(1,898,012)	(113,076)
Goodwill, Total, ending balance	0	2,715	1,787,651
Finite-lived Intangible Assets [Roll Forward]
Other Intangible Assets, Gross, Beginning Balance	113,471	113,471	113,471
Other Intangible Assets, Accumulated Amortization, Beginning Balance	(100,111)	(95,125)	(89,507)
Total Expected Amortization, Beginning Balance	13,360	18,346	23,964
Other Intangible Assets, Amortization	(4,520)	(4,986)	(5,618)
Other Intangible Assets, Gross, Ending Balance	113,471	113,471	113,471
Other Intangible Assets, Accumulated Amortization, Ending Balance	(104,631)	(100,111)	(95,125)
Total Expected Amortization, Ending Balance	$ 8,840	$ 13,360	$ 18,346