Notes and Other Receivables (Details) (USD $)	9 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 50,316,000		$ 66,369,000
Secured Due January 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	0		7,331,000
Stated interest rate (in hundredths)	9.80%
Secured Due November 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	0	[1]	12,428,000	[1]
Stated interest rate (in hundredths)	5.00%
Note receivable contributed to Elkhorn co-investment	12,400,000
Secured 1 Due December 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	10,925,000		10,928,000
Stated interest rate (in hundredths)	8.80%
Secured 2 Due December 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	6,342,000		6,422,000
Variable rate basis	LIBOR
Basis spread on rate (in hundredths)	8.00%
Secured Due November 2013 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	971,000		971,000
Stated interest rate (in hundredths)	8.00%
Secured Due February 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	18,285,000		17,646,000
Stated interest rate (in hundredths)	9.60%
Secured Due December 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	3,212,000	[2]	3,221,000	[2]
Stated interest rate (in hundredths)	4.00%
Note and other receivables from affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	5,025,000		2,734,000
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 5,556,000		$ 4,688,000

[1] $12.4 million note receivable was contributed to the Elkhorn co-investment during the first quarter of 2012.

[2] During the first quarter 2012, the Company amended the loan secured by Vacationer RV Park to extend the maturity date to December 2014. Beginning January 1, 2012 the note which has a carrying value of $3.2 million, bears interest at a rate of 4%, and the borrower funds an impound account for capital replacement.