Segment Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Revenue	$ 72.4	$ 73.2	$ 113.9	$ 119.3
Operating Profit	7.6	20.2	18.8	38.0
Interest expense	(4.0)	(4.2)	(8.1)	(8.5)
General Corporate Expenses	(4.0)	(4.1)	(8.7)	(8.2)
Separation Costs	(4.4)	0	(6.1)	0
Income (Loss) From Continuing Operations Before Income Taxes	(4.8)	11.9	(4.1)	21.3
Income tax expense (benefit)	(0.4)	5.2	(0.1)	9.2
Income From Continuing Operations	(4.4)	6.7	(4.0)	12.1
Income (Loss) From Discontinued Operations (net of income taxes)	0	5.6	2.4	10.0
Net Income (Loss)	(4.4)	12.3	(1.6)	22.1
Agribusiness [Member]
Segment Reporting Information [Line Items]
Revenue	39.9	43.4	53.5	59.3
Operating Profit	7.0	8.5	10.5	11.1
Real Estate Industry [Member] | Less amounts reported in discontinued operations [Member]
Segment Reporting Information [Line Items]
Revenue	0	(23.3)	(9.0)	(38.7)
Operating Profit	0	(9.3)	(3.9)	(16.7)
Real Estate Industry [Member] | Development and Sales segment [Member]
Segment Reporting Information [Line Items]
Revenue	7.0	28.0	18.4	47.7
Operating Profit	(9.9)	10.6	(9.0)	22.6
Real Estate Industry [Member] | Leasing segment [Member]
Segment Reporting Information [Line Items]
Revenue	25.5	25.1	51.0	51.0
Operating Profit	$ 10.5	$ 10.4	$ 21.2	$ 21.0