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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Annual Commitments Under Operating Leases

The Company is obligated under certain operating leases and rental agreements for railroad cars, office space, and other equipment. Certain lease agreements contain escalation clauses and are accounted for on a straight-line basis over the lease term. Future minimum annual commitments under such operating leases at December 31, 2017 are as follows:

Twelve months ending December 31,
2018		$	14,891
2019			11,254
2020			7,569
2021			5,827
2022			2,614
Thereafter			15,582

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- Definition

Tabular disclosure for lessee's operating leases. Includes, but is not limited to, description of lessee's operating lease, existence and terms of renewal or purchase options and escalation clauses, restrictions imposed by lease, such as those concerning dividends, additional debt, and further leasing, rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 55
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