Income Taxes (Details 1)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax [Line Items]
Federal income tax rate	35.00%	35.00%	35.00%
State and local taxes net of federal benefit	3.90%	3.40%	4.10%
Foreign taxes	(1.40%)	(0.10%)	(1.20%)
Permanent differences	1.50%	1.90%	2.10%
Valuation allowance adjustments	0.00%	0.00%	0.10%
Reduction of uncertain tax position liabilities	0.00%	(4.50%)	(3.10%)
Other	(0.70%)	0.90%	0.10%
Effective tax rate	38.30%	36.60%	37.10%