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Long-Term Debt - Additional Information (Detail) - 4.24% Secured Promissory Note Due 2022 [Member]	12 Months Ended
	Dec. 31, 2015
Debt Instrument [Line Items]
Loan term after conversion	7 years
Percentage of remaining outstanding principal amount	30.00%
Maturity date	May 31, 2022
Prepayment Premium After First Anniversary Date [Member] | EL Dorado Ammonia L.L.C [Member]
Debt Instrument [Line Items]
Debt instrument prepayment premium percentage to be paid	1.114%
Prepayment Premium Month Prior to Maturity Date [Member] | EL Dorado Ammonia L.L.C [Member]
Debt Instrument [Line Items]
Debt instrument prepayment premium percentage to be paid	0.031%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%
Debt instrument term	The interest rate is based on the monthly LIBOR rate plus 4.0%

X

- Definition

The debt instrument prepayment premiums percentage required by the terms of a note.

+ References

No definition available.

+ Details

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- Definition

The maturity term of a secured promissory note after the loan conversion date.

+ References

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+ Details

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- Definition

Percentage of outstanding principal amount.

+ References

No definition available.

+ Details

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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