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Amount of assets pledged to secure a debt instrument.

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Long-Term Debt - Schedule of Revolving Credit Facility and Long-Term Debt (Parenthetical) (Detail)						1 Months Ended	12 Months Ended
	Jan. 17, 2017 USD ($)	May 13, 2016 USD ($) Installment	Feb. 05, 2016 USD ($) Installment	Sep. 16, 2015 USD ($)	Apr. 09, 2015 USD ($)	Oct. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) $ / Unit	Dec. 31, 2016 USD ($)	Sep. 07, 2016 USD ($)	Aug. 01, 2016	Dec. 31, 2013 USD ($)
Debt Instrument [Line Items]
Long-term debt							$ 409,399,000
Loss on extinguishment of debt								$ 8,703,000
Proceeds of the secured promissory note		$ 4,800,000		$ 15,000,000
Climate Control Group [Member]
Debt Instrument [Line Items]
Senior secured notes redeemed						$ 106,900,000
Loss on extinguishment of debt						$ 8,700,000
Senior Secured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Redeemable principal amount									$ 50,000,000
Secured Promissory Note Due 2017 [Member]
Debt Instrument [Line Items]
Net proceeds from sale of oil and gas properties							$ 3,500,000
Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate							5.00%
Letters of credit maximum capacity	$ 10,000,000
Amount available for borrowing							$ 41,200,000
Long-term debt	$ 50,000,000
Fees expressed as percentage for unused revolving credit facility	0.25%
Maturity date	Jan. 17, 2022
Springing maturity date	90 days
Working Capital Revolver Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate	1.50%
Working Capital Revolver Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate	1.75%
Wells Fargo Capital Finance, Inc. [Member] \| Working Capital Revolver Loan [Member] \| Prime Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate	0.50%
Wells Fargo Capital Finance, Inc. [Member] \| Working Capital Revolver Loan [Member] \| Prime Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate	0.75%
EL Dorado Chemical Company [Member] \| 5.73% Secured Promissory Note Due 2019 [Member]
Debt Instrument [Line Items]
Maturity date			Jun. 29, 2019
Proceeds of the secured promissory note			$ 10,000,000
Debt instrument, number of periodic payment \| Installment			40
Debt instrument, frequency of interest payment			monthly
Final balloon payment			$ 6,700,000
5.00% Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate							5.00%	5.00%
5.73% Secured Promissory Note Due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate							5.73%	5.73%
5.25% Secured Promissory Note Due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate							5.25%	5.25%
Maturity date							Mar. 26, 2021
Maturity year					2021
Proceeds of the secured promissory note					$ 16,200,000
Secured promissory note, payment term							Interest only was payable monthly for the first 12 months of the term. Principal and interest are payable monthly for the remaining term.
Other [Member]
Debt Instrument [Line Items]
Weighted-average interest rate of other debt							4.50%	4.50%
Springing Financials Covenant [Member] \| Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Long-term debt							$ 5,000,000
Working capital revolver loan requirements							Borrowers must maintain a minimum fixed charge coverage ratio of not less than 1.00 to 1.00
Loan requirements description							less than or equal to the greater of 10.0% of the total revolver commitments and $5 million
Fixed charge coverage ratio							1.00%
Springing Financials Covenant [Member] \| Working Capital Revolver Loan [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Maximum revolver commitment available, percentage							10.00%
7.75% Senior Secured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Aggregate principal amount of notes sold											$ 425,000,000
Debt instrument, interest rate										8.50%	7.75%
Maturity year							2019
12% Senior Secured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate							12.00%		12.00%
Redeemable principal amount									$ 50,000,000
Interest expense recognized								$ 1,200,000
Senior Secured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Cash payment for debt holder consent							$ 5,400,000
Cash price per $1,000 principal amount of notes for consent \| $ / Unit							13.25
Other fees incurred							$ 1,400,000
First Priority Secured Notes [Member]
Debt Instrument [Line Items]
Carrying value of the assets							1,000,000,000
Second Priority Secured Notes [Member]
Debt Instrument [Line Items]
Carrying value of the assets							$ 81,000,000
Secured Promissory Note Due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate							5.62%	5.62%
Debt instrument, number of periodic payment \| Installment		83
Final balloon payment		$ 6,100,000
Loan term after conversion		7 years
Secured Promissory Note Due 2023 [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Maturity date							May 31, 2023
Debt instrument, interest rate		5.62%
Debt instrument term							interest at a rate that is based on the monthly LIBOR rate plus a base rate for a total of 5.62% and matures in May 2023
Secured Promissory Note Due 2023 [Member] \| EL Dorado Ammonia L.L.C [Member]
Debt Instrument [Line Items]
Aggregate principal amount of notes sold				$ 19,800,000