Acquisition of Florida Chemical Company, Inc. - Additional Disclosures (Details) (USD $)	1 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended
	May 31, 2013	Sep. 30, 2013	Sep. 30, 2012	May 10, 2013 Florida Chemical Company, Inc [Member]	Sep. 30, 2013 Florida Chemical Company, Inc [Member]	Sep. 30, 2013 Florida Chemical Company, Inc [Member]	May 31, 2013 Revolving Credit Facility [Member]	May 31, 2013 Selling, General and Administrative Expenses [Member] Florida Chemical Company, Inc [Member]
Business Acquisition [Line Items]
Percent of oustanding shares acquired				100.00%
Increase in long-term debt	$ 25,000,000	$ 26,190,000	$ 0
Additional borrowings on credit facility							28,700,000
Common stock, shares issued (in shares)				3,284,180
Escrow fund to cover indemnification obligations				10,000,000
Revenue of the acquired business from the date of acquisition					18,600,000	33,100,000
Income from operations of the acquired business from the date of acquisition					3,900,000	6,600,000
Acquisition costs incurred								$ 1,400,000