Segment Information (Textual) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (business segments) \| segment	4
Property, plant and equipment, net	$ 879,179	$ 938,418
Rail Group assets leased to others, net	591,946	584,298
Canada \| Trade
Segment Reporting Information [Line Items]
Property, plant and equipment, net	39,900	41,200
Canada \| Railcar \| Rail
Segment Reporting Information [Line Items]
Rail Group assets leased to others, net	$ 20,800	$ 22,700
Customer Concentration Risk \| Revenues
Segment Reporting Information [Line Items]
Concentration risk percentage	10.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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