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Derivative Activities - Additional Information (Detail) $ in Millions	Mar. 31, 2020 USD ($) MMBTU bbl
Derivatives Excluding Basis Swaps and Freight Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 256.0
Commodity | Natural Gas Basis Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 4.8
Volume Hedged | MMBTU	125,180,000
Commodity | Propane Spread Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 651,000.0
Volume Hedged | bbl	1,500,000
Freight | Swaps | Level 2
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ (4.7)

X

- Definition

The sum of the notional amount of derivative over the life of the entire contract, expressed in nonmonetary units. For example, the total number of British Thermal Unit (BTU) specified in a fuel oil forward purchase contract.

+ References

No definition available.

+ Details

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X

- Definition

The sum of the notional amount of derivative over the life of the entire contract, expressed in nonmonetary units. For example, the total number of barrels specified in a fuel oil forward purchase contract.

+ References

No definition available.

+ Details

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X

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

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- Definition

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.

+ References

No definition available.

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- Details

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