Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended		6 Months Ended				6 Months Ended				6 Months Ended
	Apr. 30, 2013	Jun. 30, 2014	Jun. 30, 2014 Chemical Business [Member] Plant Facility	Jun. 30, 2014 Climate Control Business [Member]	Jun. 30, 2014 Pryor Chemical Company [Member] Cases	Apr. 19, 2013 Pryor Chemical Company [Member] Cases	Jun. 30, 2014 Hallowell Facility [Member] Subsidiary	Jun. 30, 2014 El Dorado Facility [Member]	Jun. 30, 2014 El Dorado Facility [Member] Ammonia Plant [Member]	Jun. 30, 2014 El Dorado Facility [Member] Nitric Acid Plant [Member]	Jun. 30, 2014 El Dorado Facility [Member] Minimum [Member] Ammonia Plant [Member]	Jun. 30, 2014 El Dorado Facility [Member] Minimum [Member] Nitric Acid Plant [Member]	Jun. 30, 2014 El Dorado Facility [Member] Maximum [Member] Ammonia Plant [Member]	Jun. 30, 2014 El Dorado Facility [Member] Maximum [Member] Nitric Acid Plant [Member]	Jun. 30, 2014 Amended Ammonium Nitrate Supply Agreement [Member] Orica International [Member]	Jun. 30, 2014 Amended Ammonium Nitrate Supply Agreement [Member] Orica International [Member] Minimum [Member] T
Commitments And Contingencies [Line Items]
Estimated range of project costs to construct plant											$ 250,000,000	$ 115,000,000	$ 300,000,000	$ 125,000,000
Project costs capitalized									74,000,000	73,000,000
Current purchase agreement quantity with Orica International																240,000
Ammonium nitrate supply agreement maturity date															Apr. 09, 2015
Notice of termination															Required notice of termination of one year
Accrued liabilities for environmental matters		551,000
Operating agreement maturity date								Dec. 31, 2053
Penalty related to discharge water permit		100,000
Number of nitric acid production facilities			9
Plants compliant with Clean Air Act			3
Minimum range of estimated capital cost to meet Clean Air Act emission rates			2,000,000
Maximum range of estimated capital cost to meet Clean Air Act emission rates			3,000,000
Plants requiring capital investment to achieve Clean Air Act compliance			5
Reforestation mitigation accrued project costs			150,000
Amount of civil penalty to be paid			725,000
Amount of civil penalty					100,000
Number of alleged non-compliance issues						15
Number of alleged violation resolved through a global settlement					3
Number of alleged violations resolved through civil penalty payment					12
Number of subsidiaries under Chemical Business that sold their operating assets							2
Insurance coverage of general liability risks	100,000,000
Product liability deductible per claim	250,000			250,000
Accrued general liability insurance claims		$ 261,000