Land Held for Divestiture (Details 2) (USD $)	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Land Held for Divestiture disclosures [Abstract]
Net loss on sales of land held for divestiture of unconsolidated entities	$ (147,000)	$ 0
Net loss on land held for divestiture activity of unconsolidated entities	$ (147,000)	$ 0