Income Taxes (Components Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic, current	$ 77,936	$ (19,255)	$ 57,916
Foreign, current	41,833	29,882	48,203
Total current tax expense	119,769	10,627	106,119
Domestic, deferred	(77,255)	(222,427)	19,991
Foreign, deferred	79,984	(101,663)	43,367
Total deferred tax expense (benefit)	2,729	(324,090)	63,358
Income tax expense (benefit)	$ 122,498	$ (313,463)	$ 169,477