Note 8 - Mortgages and Other Financing Receivables (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Number of Days Past Due	90
Number of Portfolio Segments	1
Mortgage Loans on Real Estate, Number of Loans	1
In Default [Member] | In Non-Accrual Status [Member]
Mortgage Loans on Real Estate, Number of Loans	5
Mortgage Loans on Real Estate (in Dollars)	19.1
In Default [Member] | Past 90 Days Due [Member]
Mortgage Loans on Real Estate, Number of Loans	1
In Default [Member] | Accrual Status [Member]
Number of Days Past Due	90
Mortgage Loans on Real Estate (in Dollars)	22.4
In Default [Member]
Mortgage Loans on Real Estate, Number of Loans	6
Mortgage Loans on Real Estate (in Dollars)	41.5
Minimum [Member]
Nonperformance Dates	18 months
Maximum [Member]
Nonperformance Dates	6 years