Income Taxes (Effective Income Tax Rates Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Statutory US federal income tax rate	34.00%	35.00%	35.00%
US state income taxes, net of federal benefit	(0.80%)	0.40%	1.00%
Non-US tax rate differential	(28.70%)	(22.80%)	(2.60%)
Tax holidays	(3.50%)	(14.00%)	(23.50%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	1.40%	0.00%	0.00%
Passive income exemption	(2.10%)	(1.40%)	(2.90%)
Acquisition contingent earnout liability adjustments	0.00%	(0.90%)	(0.60%)
Foreign enhanced R&D deductions	(0.00%)	(0.90%)	(1.00%)
Nondeductible items	2.50%	9.10%	0.80%
Effect of valuation allowance	(3.60%)	(2.30%)	(2.20%)
Release of DTL on intangibles transferred	0.00%	(3.50%)	0.00%
Prior year true-ups	1.10%	2.80%	3.20%
Uncertain tax positions	5.80%	0.10%	0.10%
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017 Percent	(2.40%)	0.00%	0.00%
Other	(0.10%)	0.10%	0.80%
Effective tax rate from ongoing operations	0.80%	1.70%	8.10%