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Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments And Contingencies [Abstract]

Components Of Lease Expense

		Year Ended December 31,
		2020			2019
Lease expense
Operating lease expense		$	20,771		$	20,806
Variable lease expense (1)			1,681			824
Total lease expense		$	22,452		$	21,630

(1)Represents amounts incurred in excess of the minimum payments required for a certain building lease and for the handling and unloading of railcars for a certain land lease, offset by railcar lease abatements provided by the lessor when railcars are out of service during periods of maintenance or upgrade.

Supplemental Cash Flow Information Related To Operating Leases

		Year Ended December 31,
		2020			2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		$	20,864		$	21,459
Right-of-use assets obtained in exchange for lease obligations:
Operating leases			32,713			11,176
Right-of-use assets and lease obligations derecognized due to lease modifications:
Operating leases			5,176			1,726

Supplemental Balance Sheet Information Related To Operating Leases

		2020			2019
Weighted average remaining lease term			6.2 years			6.6 years
Weighted average discount rate			4.55%			5.46%

Schedule of Aggregate Minimum Lease Payments

Year Ending December 31,		Amount
2021		$	17,303
2022			15,289
2023			11,711
2024			9,902
2025			6,441
Thereafter			15,350
Total			75,996
Less: Present value discount			(11,545)
Lease liabilities		$	64,451

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Supplemental Balance Sheet Information Related To Operating Leases [Table Text Block]

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Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

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Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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