Segment Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended			3 Months Ended								12 Months Ended						0 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Agribusiness	Sep. 30, 2013 Agribusiness	Jun. 30, 2013 Agribusiness	Mar. 31, 2013 Agribusiness	Dec. 31, 2012 Agribusiness	Sep. 30, 2012 Agribusiness	Jun. 30, 2012 Agribusiness	Mar. 31, 2012 Agribusiness	Dec. 31, 2013 Agribusiness	Dec. 31, 2012 Agribusiness	Dec. 31, 2011 Agribusiness	Dec. 31, 2013 Customer Concentration Risk Agribusiness C&H Sugar Company, Inc	Dec. 31, 2012 Customer Concentration Risk Agribusiness C&H Sugar Company, Inc	Dec. 31, 2011 Customer Concentration Risk Agribusiness C&H Sugar Company, Inc	Oct. 02, 2013 Natural Materials and Construction Grace Pacific Corporation Segment
Revenue, Major Customer [Line Items]
Number of operating segments									4																	1
Revenue	$ 204.8	$ 64.9	$ 62.7	$ 32.8	$ 82.1	$ 83.9	$ 63.3	$ 32.2	$ 365.2	$ 261.5	$ 235.1	$ 52.0	$ 35.9	$ 43.5	$ 14.7	$ 60.9	$ 67.9	$ 39.9	$ 13.6	$ 146.1	$ 182.3	$ 157.5	$ 87.6	$ 117.5	$ 93.2