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Property, Plant and Equipment (Rail Group Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
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Components of Railcar assets leased to others |  |  |
Rail Group assets leased to others, gross | $ 737,862 | $ 750,473 | $ 740,809
Less: accumulated depreciation | 157,263 | 158,527 | 143,740
Railcar assets leased to others, net | $ 580,599 | $ 591,946 | $ 597,069

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- Definition The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77907726&loc=d3e41460-112716 + Details
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- Definition Amount before accumulated depreciation of physical assets used in the normal conduct of business to produce goods and services subject to or available for lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77907726&loc=d3e41457-112716 + Details
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- Definition The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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