Additional borrowings debt instrument increase additional borrowings.

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- Definition

Equity method investments ownership percentage.

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- Definition

Investment in Subsidiary.

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- Definition

Number of equity investors in holdings unrelated to parent company.

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- Definition

Ownership interest in investee.

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- Definition

Percentage of additional interest that could be acquired under certain circumstances.

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- Definition

Percentage of equity investor's net investment to be paid by Company, Price if exercised by Company.

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- Definition

Percentage of equity investor's net investment to be paid by Company, Price if exercised by equity investor.

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- Definition

Railcars purchased by leasing.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Investment in TRIP Holdings (Details Textuals) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011	Dec. 31, 2007	Jul. 06, 2011	Jun. 30, 2011 TRIP Holdings [Member]	Jun. 30, 2010 TRIP Holdings [Member]	Jun. 30, 2011 TRIP Holdings [Member]	Jun. 30, 2010 TRIP Holdings [Member]	Jul. 06, 2011 TRIP Holdings [Member]
Investment in TRIP Holdings (Textuals) [Abstract]
Number of equity investor partners in TRIP Holdings		3
Ownership percentage in TRIP Holdings	57.00%
Ownership Interest Increase in TRIP Holdings	The Company receives distributions from TRIP Holdings as an equity investor, when allowed, in proportion to its 57% equity interest and has an interest in the net assets of TRIP Holdings upon a liquidation event in the same proportion.
Additional borrowings debt instrument increase additional borrowings			$ 1,032.0
Percentage of additional interest that could be acquired under certain circumstances								16.30%
Railcars purchased by TRIP from the Company	1,284.7
Payments to TILC from TRIP Holdings and TRIP leasing				$ 1.0	$ 1.0	$ 1.9	$ 1.9
Percentage of equity investor's net investment to be paid by Company, Price if exercised by equity investor								90.00%
Percentage of equity investor's net investment to be paid by Company, Price if exercised by Company								100.00%