Income Taxes (Details 1)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal income tax rate	35.00%	35.00%	35.00%
State and local taxes net of federal benefit	2.40%	3.20%	4.30%
Domestic production deduction	(0.60%)	(0.60%)	(3.70%)
Foreign tax rate differential	(5.80%)	(4.30%)	(0.20%)
Permanent differences	4.80%	2.10%	2.00%
Other	(3.20%)	1.20%	(0.70%)
Effective tax rate	32.60%	36.60%	36.70%