Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 72,889	$ 67,759	$ 172,984	$ 148,654
Tax Adjustments, Settlements, and Unusual Provisions	0	664	0	(2,685)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	0	(58,949)	0	(59,139)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	84	7,537	1,373	8,795
Income Tax Reconciliation Foreign Income Tax Basis Differential	(9,550)	(2,371)	(30,626)	(9,264)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	27,721	(5,334)	50,607	5,357
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	3,259	1,851	6,223	650
Income Tax Reconciliation Change In Foreign Enacted Tax Rate	116	(166)	(1,621)	30
Income Tax Reconciliation SubpartF	(26)	(99)	440	211
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(651)	(544)	(759)	(1,003)
Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income	0	7,624	0	11,916
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	1,034	817	6,189	5,067
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(8,362)	4,213	(4,400)	4,108
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(121)	94	729	(492)
Income Tax Expense (Benefit)	$ 84,325	$ 21,462	$ 188,761	$ 102,071
Effective Income Tax Rate Reconciliation, Percent	24.30%	6.70%	22.90%	14.40%