Note 10 - Mortgages and Other Financing Receivables (Details) - Mortgage Loans and Other Financing Receivables - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at January 1	$ 74,013	$ 30,243	$ 70,704
Additions:
New mortgage loans	5,730	52,728	8,527
Deductions:
Balance at December 31	23,824	74,013	30,243
Additions Under Existing Mortgage Loans [Member]
Additions:
Other additions			7,810
Write-off of Loan Discounts [Member]
Additions:
Other additions		286
Amortization of Loan Discounts [Member]
Additions:
Other additions	112	126	653
Loan Repayments [Member]
Deductions:
Collections of Principal	(53,646)	(7,330)	(28,068)
Loan Foreclosures [Member]
Deductions:
Collections of Principal			(25,572)
Charge Off/Foreign Currency Translation [Member]
Deductions:
Other deductions	(884)	(1,066)	(1,260)
Collections of Principal [Member]
Deductions:
Collections of Principal	(1,499)	(972)	(2,529)
Amortization of Loan Costs [Member]
Deductions:
Other deductions	$ (2)	$ (2)	$ (22)