Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation of Statutory Federal Income Tax Rate to Effective Rate) (Details)

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Income Taxes (Reconciliation of Statutory Federal Income Tax Rate to Effective Rate) (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Provision for federal income taxes at the statutory rate 35.00% 35.00% 35.00%
State and local income taxes, net of federal benefit 2.20% 1.50% 1.50%
Non-U.S. income taxes at different rates (3.90%) (3.40%) (3.70%)
Foreign tax credits (1.70%) 0.00% (0.50%)
Reduction of uncrecognized tax benefits (0.80%) (3.20%) (1.90%)
Research credits (0.90%) (0.90%) (2.10%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent 2.70% 0.00% 0.00%
Other 0.10% (0.50%) 0.50%
Actual provision for income taxes 27.30% 28.50% 28.80%