Income Taxes (Details 3)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Statutory rates	21.00%	34.00%	34.00%
State and local taxes, net of Federal benefit	0.40%	0.20%	0.30%
Benefit of Foreign Derived Intangible Income	(0.60%)
Deferred tax effect of statutory tax rate changes		1.40%
Foreign income tax recovery		(4.60%)
Effect of foreign taxes greater than (less than) U.S. statutory rates	7.30%	(1.00%)	1.50%
Other	(0.80%)	(0.80%)	(0.30%)
Effective rates	27.30%	29.20%	35.50%