Income Taxes Income Taxes - Income Tax Reconciliation (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
United States statutory rate	35.00%	35.00%	35.00%
State and local taxes	0.20%	0.13%	0.20%
Foreign tax rate differential	(3.70%)	(2.90%)	(3.30%)
Amended returns filed	0.00%	0.00%	(1.40%)
Other items, net	0.00%	(0.70%)	(0.20%)
Total effective tax rate	31.50%	31.50%	30.30%