Legal Proceedings and Other Contingencies (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 claim	Dec. 14, 2012 Viareggio [Member] affiliate_investment Employee	Jun. 29, 2009 Viareggio [Member] Car casualty	Dec. 14, 2012 Derailed [Member] Viareggio [Member] Company	Jun. 29, 2009 Overturned [Member] Viareggio [Member] Car	Jun. 29, 2009 Punctured and Ignited [Member] Viareggio [Member] Car
Loss Contingencies [Line Items]
Number of railars			14		5	1
Number of casualties			32
Number of subsidiaries		2
Number of companies				4
Number of employees		18
Loss Contingency, New Claims Filed, Number	110
Legal Fees	$ 4.0