Schedule IV - Mortgage Notes Receivable on Real Estate (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008
Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.33%		8.76%
Minimum Interest Rate in Range	2.70%
Maximum Interest Rate in Range	12.00%
Monthly Payment Amount	$ 106	[1]
Balloon Payment at Maturity	17,025
Face Amount of Mortgages	21,287
Principal Amount of Mortgage Subject to Delinquent Principal or Interest	78
Federal Income Tax Basis	19,383	[2]
Mortgage Loans on Real Estate, Renewed and Extended, Amount	4,607
Debt Instrument Interest Rate Stated Percentage Increase After Year One	4.50%
Debt Instrument Interest Rate Stated Percentage Increase After Year Two	4.75%
Movement in Mortgage Loans on Real Estate [Roll Forward]
Beginning balance	34,239		30,519		38,208
Additions	0		15,334	1,001
Receipt of land in lieu of payment	0		(2,235)	0
Non-cash transfer	(12,741)		0	(7,081)
Write-off of uncollectible amounts	0		(1,900)	0
Payments	(2,115)		(7,479)	(1,609)
Ending balance	19,383		34,239	30,519	38,208
Other Mortgage, Type [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate Description	2.71% -  12.00%	[3]
Monthly Payment Amount	17	[1]
Balloon Payment at Maturity	3,418
Face Amount of Mortgages	6,460
Principal Amount of Mortgage Subject to Delinquent Principal or Interest	78
Federal Income Tax Basis	5,881	[2]
Basis Spread on Variable Rate, During Period	2.00%
Interest Rate, Current Variable Rate	5.25%
New Garden Crossing [Member] | First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Basis Spread on Variable Rate, During Period	2.50%
Coastal Grand - MyrtleBeach [Member] | First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	7.75%
Monthly Payment Amount	58	[1],[4]
Balloon Payment at Maturity	9,000
Face Amount of Mortgages	9,000
Principal Amount of Mortgage Subject to Delinquent Principal or Interest	0
Federal Income Tax Basis	9,000	[2]
One Park Place [Member] | First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	5.00%
Monthly Payment Amount	21	[1],[5]
Balloon Payment at Maturity	2,007
Face Amount of Mortgages	3,200
Principal Amount of Mortgage Subject to Delinquent Principal or Interest	0
Federal Income Tax Basis	1,902	[2]
Village Square, Houghton Lake and Cadillac [Member] | First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Interest Rate	4.25%	[6]
Monthly Payment Amount	10	[1],[4],[5]
Balloon Payment at Maturity	2,600
Face Amount of Mortgages	2,627
Principal Amount of Mortgage Subject to Delinquent Principal or Interest	0
Federal Income Tax Basis	$ 2,600	[2]

[1] Equal monthly installments comprised of principal and interest, unless otherwise noted.

[2] The aggregate carrying value for federal income tax purposes was $19,383 at December 31, 2012.

[3] Mortgage and other notes receivable aggregated in Other included a variable-rate note that bears interest at prime plus 2.0%, currently at 5.25%, and a variable-rate note that bears interest at LIBOR plus 2.50%.

[4] Payment represents interest only.

[5] Loans included in the schedule above which were extended or renewed during the year ended December 31, 2012 aggregated approximately $4,607.

[6] Interest rate increases annually to 4.50% on April 1, 2013 and 4.75% on April 1, 2014.