Acquisition of Florida Chemical Company, Inc. - Additional Disclosures (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended	1 Months Ended
	May 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 segment	Jun. 30, 2012	May 10, 2013 Florida Chemical Company, Inc [Member]	Jun. 30, 2013 Florida Chemical Company, Inc [Member]	Jun. 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 outstasnding shares acquired						100.00%
Acquisition costs incurred										$ 1,100,000
Estimated statutory rate		35.90%	29.20%	35.60%	29.60%		38.70%	38.70%
Number of segments				4
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							14,500,000	14,500,000
Income from operations of the acquired business from the date of acquisition							$ 2,700,000	$ 2,700,000