Partially-Owned Leasing Subsidiaries	6 Months Ended
Jun. 30, 2013
Partially-Owned Leasing Subsidiaries [Abstract]
Partially-Owned Leasing Subsidiaries	Partially-Owned Leasing Subsidiaries The Company, through its wholly-owned subsidiary, TILC, formed two subsidiaries, TRIP Holdings and RIV 2013, for the purpose of providing railcar leasing in North America. Each of TRIP Holdings and RIV 2013 are direct, partially-owned subsidiaries of TILC and are each governed by a seven member board of representatives, two of which are designated by TILC. TILC is the agent of each of TRIP Holdings and RIV 2013 and as such, has been delegated the authority, power and discretion to take certain actions on behalf of the respective companies. Each of TRIP Holdings and RIV 2013 in turn has wholly-owned subsidiaries, which are the owners of railcars. These wholly-owned subsidiaries are TRIP Master Funding (wholly-owned by TRIP Holdings) and Trinity Rail Leasing 2012 LLC ("TRL 2012", wholly-owned by RIV 2013). TILC is the servicer for TRIP Master Funding and TRL 2012, with the authority to manage and service the railcars owned by them. The Company's controlling interest in each of TRIP Holdings and RIV 2013 results from its combined role as both equity member and agent/servicer. The Company's noncontrolling interest included in the accompanying Consolidated Balance Sheets represents the non-Trinity equity interest in these partially-owned subsidiaries. The railcars owned by TRIP Master Funding were originally acquired from the Company's Rail and Leasing Groups by TRIP Rail Leasing LLC ("TRIP Leasing"), a wholly-owned subsidiary of TRIP Holdings. TRIP Master Funding acquired the railcars from TRIP Leasing in July 2011. TRIP Leasing currently owns no railcars and is not expected to acquire any railcars. TRIP Holdings and RIV 2013, through TRIP Leasing and TRL 2012, respectively, acquired railcars from the Company's Rail and Leasing Groups funded by capital contributions from TILC and, in the case of TRIP Holdings, third-party equity investors, and from secured borrowings. Railcars purchased from the Company by TRL 2012 are required to be purchased at fair value as determined by TILC and approved by TRL 2012's board of representatives. TRIP Holdings and TRIP Master Funding are not expected to acquire additional railcars, other than as replacement for railcars subject to permitted sale or casualty. The assets of each of TRIP Holdings, TRIP Master Funding, RIV 2013, and TRL 2012 may only be used to satisfy the particular subsidiary's liabilities, and the creditors of each of TRIP Holdings, TRIP Master Funding, RIV 2013, and TRL 2012 have recourse only to the particular subsidiary's assets. Each of TILC and the third party equity investors receive distributions from TRIP Holdings and RIV 2013 as equity investors, when allowed, in proportion to its respective equity interests, and has an interest in the net assets of the partially-owned subsidiaries upon a liquidation event in the same proportion. TILC is paid fees for the services it provides to TRIP Master Funding and TRL 2012 and has the potential to earn certain incentive fees. With respect to RIV 2013, TILC has a commitment that expires May 2016 to provide additional equity funding for the purchase of railcars and satisfaction of certain other liabilities of RIV 2013 of up to $49.3 million as of June 30, 2013. The third party equity investors in RIV 2013 have a similar commitment that expires May 2016 to provide up to $107.7 million of additional equity funding. TILC and the third party equity investors may have additional commitments to provide equity funding to RIV 2013 that expire in May 2019 contingent upon certain returns on investment in RIV 2013 and other conditions being met. With respect to both partially-owned subsidiaries, Trinity has no obligation to guarantee performance under any of the partially-owned subsidiaries' (or their respective subsidiaries') debt agreements, guarantee any railcar residual values, shield any parties from losses, or guarantee minimum yields. TRIP Holdings. In March 2013, the Company purchased an additional interest in TRIP Holdings from another equity investor for $31.7 million resulting in a reduction in the carrying amount of noncontrolling interest by $32.3 million. As a result, certain previous put/call agreements with the equity investor regarding their equity interest were terminated. In May 2013, the Company sold an interest in TRIP Holdings to certain third-party investors for a net amount of $200.3 million. Proceeds from the sale along with an additional equity contribution by TILC, were primarily used to retire the TRIP Holdings senior secured notes in their entirety. Additionally, the remaining interests of certain other equity investors were repurchased by TRIP Holdings for $52.3 million. At June 30, 2013, the Company's carrying value of its investment in TRIP Holdings, eliminated in consolidation, was $161.8 million representing the Company's 45% ownership interest. RIV 2013. In May 2013, the Company formed RIV 2013, contributing its investment in TRL 2012 which had been formed as a wholly-owned railcar leasing subsidiary of TILC in December 2012. In May 2013, the Company sold an interest in RIV 2013 to certain third-party investors for a net amount of $94.6 million. At June 30, 2013, the Company's carrying value of its investment in RIV 2013, eliminated in consolidation, was $21.8 million representing the Company's 31% interest. On July 31, 2013, TILC and the noncontrolling interests of RIV 2013 contributed $23.4 million and $51.0 million, respectively, to RIV 2013 in proportion to their respective equity interests. These contributions combined with additional secured borrowings were used to purchase additional railcar equipment from the Company and TILC. See Note 11 Debt regarding the debt of TRIP Holdings and RIV 2013 and their respective subsidiaries.

Partially-Owned Leasing Subsidiaries

The Company, through its wholly-owned subsidiary, TILC, formed two subsidiaries, TRIP Holdings and RIV 2013, for the purpose of providing railcar leasing in North America. Each of TRIP Holdings and RIV 2013 are direct, partially-owned subsidiaries of TILC and are each governed by a seven member board of representatives, two of which are designated by TILC. TILC is the agent of each of TRIP Holdings and RIV 2013 and as such, has been delegated the authority, power and discretion to take certain actions on behalf of the respective companies. Each of TRIP Holdings and RIV 2013 in turn has wholly-owned subsidiaries, which are the owners of railcars. These wholly-owned subsidiaries are TRIP Master Funding (wholly-owned by TRIP Holdings) and Trinity Rail Leasing 2012 LLC ("TRL 2012", wholly-owned by RIV 2013). TILC is the servicer for TRIP Master Funding and TRL 2012, with the authority to manage and service the railcars owned by them. The Company's controlling interest in each of TRIP Holdings and RIV 2013 results from its combined role as both equity member and agent/servicer. The Company's noncontrolling interest included in the accompanying Consolidated Balance Sheets represents the non-Trinity equity interest in these partially-owned subsidiaries. The railcars owned by TRIP Master Funding were originally acquired from the Company's Rail and Leasing Groups by TRIP Rail Leasing LLC ("TRIP Leasing"), a wholly-owned subsidiary of TRIP Holdings. TRIP Master Funding acquired the railcars from TRIP Leasing in July 2011. TRIP Leasing currently owns no railcars and is not expected to acquire any railcars.

TRIP Holdings and RIV 2013, through TRIP Leasing and TRL 2012, respectively, acquired railcars from the Company's Rail and Leasing Groups funded by capital contributions from TILC and, in the case of TRIP Holdings, third-party equity investors, and from secured borrowings. Railcars purchased from the Company by TRL 2012 are required to be purchased at fair value as determined by TILC and approved by TRL 2012's board of representatives. TRIP Holdings and TRIP Master Funding are not expected to acquire additional railcars, other than as replacement for railcars subject to permitted sale or casualty. The assets of each of TRIP Holdings, TRIP Master Funding, RIV 2013, and TRL 2012 may only be used to satisfy the particular subsidiary's liabilities, and the creditors of each of TRIP Holdings, TRIP Master Funding, RIV 2013, and TRL 2012 have recourse only to the particular subsidiary's assets. Each of TILC and the third party equity investors receive distributions from TRIP Holdings and RIV 2013 as equity investors, when allowed, in proportion to its respective equity interests, and has an interest in the net assets of the partially-owned subsidiaries upon a liquidation event in the same proportion. TILC is paid fees for the services it provides to TRIP Master Funding and TRL 2012 and has the potential to earn certain incentive fees. With respect to RIV 2013, TILC has a commitment that expires May 2016 to provide additional equity funding for the purchase of railcars and satisfaction of certain other liabilities of RIV 2013 of up to $49.3 million as of June 30, 2013. The third party equity investors in RIV 2013 have a similar commitment that expires May 2016 to provide up to $107.7 million of additional equity funding. TILC and the third party equity investors may have additional commitments to provide equity funding to RIV 2013 that expire in May 2019 contingent upon certain returns on investment in RIV 2013 and other conditions being met. With respect to both partially-owned subsidiaries, Trinity has no obligation to guarantee performance under any of the partially-owned subsidiaries' (or their respective subsidiaries') debt agreements, guarantee any railcar residual values, shield any parties from losses, or guarantee minimum yields.

TRIP Holdings. In March 2013, the Company purchased an additional interest in TRIP Holdings from another equity investor for $31.7 million resulting in a reduction in the carrying amount of noncontrolling interest by $32.3 million. As a result, certain previous put/call agreements with the equity investor regarding their equity interest were terminated. In May 2013, the Company sold an interest in TRIP Holdings to certain third-party investors for a net amount of $200.3 million. Proceeds from the sale along with an additional equity contribution by TILC, were primarily used to retire the TRIP Holdings senior secured notes in their entirety. Additionally, the remaining interests of certain other equity investors were repurchased by TRIP Holdings for $52.3 million. At June 30, 2013, the Company's carrying value of its investment in TRIP Holdings, eliminated in consolidation, was $161.8 million representing the Company's 45% ownership interest.

RIV 2013. In May 2013, the Company formed RIV 2013, contributing its investment in TRL 2012 which had been formed as a wholly-owned railcar leasing subsidiary of TILC in December 2012. In May 2013, the Company sold an interest in RIV 2013 to certain third-party investors for a net amount of $94.6 million. At June 30, 2013, the Company's carrying value of its investment in RIV 2013, eliminated in consolidation, was $21.8 million representing the Company's 31% interest. On July 31, 2013, TILC and the noncontrolling interests of RIV 2013 contributed $23.4 million and $51.0 million, respectively, to RIV 2013 in proportion to their respective equity interests. These contributions combined with additional secured borrowings were used to purchase additional railcar equipment from the Company and TILC.

See Note 11 Debt regarding the debt of TRIP Holdings and RIV 2013 and their respective subsidiaries.