Railcar Leasing and Management Services Group (Details Textual) (USD $)	3 Months Ended								12 Months Ended					12 Months Ended						12 Months Ended			12 Months Ended			1 Months Ended		12 Months Ended			1 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009 Recourse Term loan	Dec. 31, 2009 Recourse Capital lease obligations	Dec. 31, 2013 Railcar Leasing and Management Services Group	Dec. 31, 2012 Railcar Leasing and Management Services Group	Dec. 31, 2011 Railcar Leasing and Management Services Group	Dec. 31, 2013 Railcar Leasing and Management Services Group Wholly-owned subsidiaries	Dec. 31, 2013 Railcar Leasing and Management Services Group TRIP Holdings	Dec. 31, 2013 Railcar Leasing and Management Services Group TRL 2012	Dec. 31, 2013 Railcar Leasing and Management Services Group Wholly owned qualified subsidiaries for leasing railcars from the Trusts	Dec. 31, 2009 Railcar Leasing and Management Services Group Recourse Term loan	Dec. 31, 2009 Railcar Leasing and Management Services Group Recourse Capital lease obligations	Dec. 31, 2013 Railcar Leasing and Management Services Group Minimum	Dec. 31, 2013 Railcar Leasing and Management Services Group Maximum	Dec. 31, 2013 Element Railcar Leasing and Management Services Group	Jan. 31, 2014 Element Railcar Leasing and Management Services Group Wholly-owned subsidiaries	Dec. 31, 2013 Element Railcar Leasing and Management Services Group Wholly-owned subsidiaries	Dec. 31, 2013 Railcars owned one year or less at the time of sale Railcar Leasing and Management Services Group	Dec. 31, 2012 Railcars owned one year or less at the time of sale Railcar Leasing and Management Services Group	Dec. 31, 2011 Railcars owned one year or less at the time of sale Railcar Leasing and Management Services Group	Jan. 31, 2014 Railcars owned one year or less at the time of sale Element Railcar Leasing and Management Services Group Wholly-owned subsidiaries	Dec. 31, 2013 Railcars owned one year or less at the time of sale Element Railcar Leasing and Management Services Group Wholly-owned subsidiaries
Railcar Leasing and Management Services Group (Textual) [Abstract]
Term of lease contracts with third parties (in years)																							1 year	20 years
Term of debt instrument												7 years									7 years
Face value of debt instrument												$ 61,000,000									$ 61,000,000
Capital lease obligations													56,600,000									56,600,000
Net book value of equipment pledged as collateral																	1,973,200,000	1,065,000,000	620,100,000
Net book value of equipment securing capital lease obligations																	47,300,000
Net book value of unpledged equipment																	904,400,000
Period of railcars leased from the Trusts under operating leases (in years)																				22 years
First year to exercise the option to purchase at a predetermined fixed price certain of the railcars from the Trusts																				2016
Second year to exercise the option to purchase at a predetermined fixed price certain of the railcars from the Trusts																				2019
First year to exercise the option to purchase railcars at the end of the respective lease agreements																				2023
Second year to exercise the option to purchase railcars at the end of the respective lease agreements																				2026
Third year to exercise the option to purchase railcars at the end of the respective lease agreements																				2027
Assets	7,313,400,000				6,669,900,000				7,313,400,000	6,669,900,000										207,500,000
Cash																				83,100,000
Railcars																				86,100,000
Operating lease obligations guaranteed														21,900,000
Value of assets to be sold into Element's portfolio of leased railcars																									2,000,000,000
Proceeds from sale of railcars to Element from the Company's wholly-owned lease fleet																										396,000,000	105,000,000
Revenues	$ 1,256,000,000	$ 1,110,300,000	$ 1,066,100,000	$ 932,900,000	$ 1,012,900,000	$ 907,300,000	$ 995,500,000	$ 896,200,000	$ 4,365,300,000	$ 3,811,900,000	$ 2,938,300,000			$ 645,400,000	$ 644,400,000	$ 551,400,000												$ 58,500,000	$ 118,600,000	$ 59,400,000	$ 173,500,000	$ 39,600,000