Income Taxes Income Taxes (Components Of Income Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Current Federal Tax Expense (Benefit)	$ 17,233	$ 55,804	$ 46,293
Current State and Local Tax Expense (Benefit)	(617)	3,265	3,874
Current Foreign Tax Expense (Benefit)	3,094	22,904	22,612
Current Income Tax Expense (Benefit)	19,710	81,973	72,779
Deferred Federal Income Tax Expense (Benefit)	16,083	15,682	6,822
Deferred State and Local Income Tax Expense (Benefit)	2,965	962	(330)
Deferred Foreign Income Tax Expense (Benefit)	6,002	(6,712)	(6,627)
Deferred income taxes	25,050	(21,432)	(13,779)
Income tax expense	$ 44,760	$ 60,541	$ 59,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent	(1.40%)	(6.20%)	(5.50%)