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Investments (Policies)
3 Months Ended
Mar. 31, 2012
Investments [Abstract]  
Land Held-for-sale [Policy Text Block]
Land inventory is accounted for as held for use and is recorded at cost, unless the carrying value is determined not to be recoverable in accordance with the accounting standards for property, plant and equipment, in which case the land inventory is written down to fair value.
Long-Term Finance Receivables [Policy Text Block]
Long-term finance receivables are collateralized by property sold, accrue interest at market-based rates and are net of an allowance for doubtful accounts.