Note 8 - Mortgages and Other Financing Receivables (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Number of Days Past Due	90
Number of Portfolio Segments	1
Mortgage Loans on Real Estate, Number of Loans	3
Minimum [Member]
Nonperformance Dates	4 months
Maximum [Member]
Nonperformance Dates	6 years
In Default [Member]
Mortgage Loans on Real Estate, Number of Loans	4
Mortgage Loans on Real Estate (in Dollars)	20.0