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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	(18) Subsequent Events On February 26, 2019, the Company entered into an agreement to sell 2,146 railcars. The sale of 1,946 railcars for consideration of $165.3 million was completed in February 2019; the sale of the remaining 200 railcars, which are currently being manufactured, for consideration of approximately $32.0 million is expected to complete in the second quarter of 2019.