Goodwill and Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Line Items]
Goodwill	$ 12.5
Goodwill and Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets	2.8	2.4	1.2
Expected future annual amortization expense, 2012	2.8
Expected future annual amortization expense, 2013	1.6
Expected future annual amortization expense, 2014	1.2
Expected future annual amortization expense, 2015	1.0
Expected future annual amortization expense, 2016	0.9
Grain [Member]
Goodwill [Line Items]
Goodwill	5.0
Plant Nutrient [Member]
Goodwill [Line Items]
Goodwill	6.8
Total amount of goodwill	1.7
Turf and Specialty [Member]
Goodwill [Line Items]
Goodwill	$ 0.7