Commitments and Contingencies (Details) (USD $)	6 Months Ended			1 Months Ended		12 Months Ended	3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Environmental [Member]	Oct. 31, 2009 Mexicana vs. Sudamfos Lawsuit [Member]	Oct. 31, 2008 Mexicana vs. Sudamfos Lawsuit [Member]	Dec. 31, 2009 Mexicana vs. Sudamfos Lawsuit [Member] t	Sep. 30, 2013 Louisiana sales and use tax [Member]	Jun. 30, 2014 Minimum [Member] Environmental [Member]	Jun. 30, 2014 Maximum [Member] Environmental [Member]	Jun. 30, 2014 Civil penalty [Member]
Loss Contingencies [Line Items]
Environmental Exit Costs, Anticipated Cost								$ 900,000	$ 1,200,000
Accrual for Environmental Loss Contingencies	1,100,000	1,100,000	1,100,000
Estimated Litigation Liability										900,000
Document Period End Date	Jun. 30, 2014
Loss Contingency, Damages Sought, Value					1,200,000		1,200,000
Phosphoric Acid						12,500
Loss Contingency, Damages Sought, Counter Lawsuit				$ 3,000,000