SCHEDULE IV (Details) (USD $)	12 Months Ended				12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Aug. 08, 2008	Dec. 31, 2008 First Mortgage [Member]	Aug. 08, 2016 First Mortgage [Member]	Aug. 01, 2013 First Mortgage [Member]	Aug. 08, 2008 First Mortgage [Member]	Dec. 31, 2011 First Mortgage [Member] Sabal Park Building -Tampa Building, Florida [Member] Percent	Aug. 08, 2016 First Mortgage [Member] Sabal Park Building -Tampa Building, Florida [Member]	Dec. 31, 2011 Second Mortgage [Member] Madisonville land - Kentucky [Member] Percent
Mortgage Loans on Real Estate [Line Items]
Number of Loans	2								1		1
Stated interest rate (in hundredths)									6.00%		7.00%
Effective interest rate (in hundredths)									6.40%
Non-recourse first mortgage Loan Maturity Date									08-08-2016		01-01-2012
Periodic Payment Terms									Interest accrued and due monthly (01/01/09 through 07/31/13); principal paydown of $550,000 due on 08/01/13; principal and interest due monthly (beginning 08/01/13); balloon payment of $3,460,000 due at maturity (08/08/16)		Principal and interest due monthly
Face Amount of Mortgages	$ 4,153,000							$ 4,994,000	$ 4,150,000		$ 3,000
Carrying Amount of Mortgages	4,110,000								4,107,000		3,000
Mortgage Loans on Real Estate, Periodic Payment Terms, Balloon Payment Amount						3,460,000				3,460,000
Mortgage Loan on Real Estate, First principal payment due August 1, 2013							550,000		550,000
Principal Amount of Loans Subject to Delinquent Principal or Interest									0		0
Changes in the mortgage loans [Roll Forward]
Balance at beginning of year	4,131,000	4,155,000	4,174,000
Payments on mortgage loans receivable	(33,000)	(37,000)	(31,000)		(844,000)
Amortization of discount on mortgage loan receivable	12,000	13,000	12,000
Balance at end of year	4,110,000	4,131,000	4,155,000
Discount on mortgage loan receivable recognized at inception of loan				198,000
Income Tax Basis of Mortgage Loans on Real Estate	$ 4,100,000