Land Held for Divestiture (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2012
Indicative bids [Member]
Fair value of land held for divestiture [Line Items]
Fair value of impairment of land held for divestiture	$ 15,663
Fair value valuation technique	Indicative bids
Fair value unobservable input	Indicative bids
Fair value range of input values	N/A	[1]
Discounted cash flow [Member]
Fair value of land held for divestiture [Line Items]
Fair value of impairment of land held for divestiture	$ 926
Fair value valuation technique	Discounted cash flows	[2]
Fair value unobservable input	N/A
Fair value range of input values	N/A

[1] These fair value measurements were developed by third party sources, subject to the Company’s corroboration for reasonableness.

[2] The Company used a discounted cash flow technique to estimate fair value; however, due to the estimated holding period being less than twelve months, the impact of discounting was deemed immaterial.