Note 7 - Mortgages and Other Financing Receivables (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Number of Days Past Due	90
Mortgage Loans on Real Estate, Number of Loans	28
In Default [Member]
Mortgage Loans on Real Estate, Number of Loans	3
Mortgage Loans on Real Estate (in Dollars)	19.2
Minimum [Member]
Nonperformance Dates	7 months
Maximum [Member]
Nonperformance Dates	7 years