Fair Value Disclosures (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Asset impairment charges relating to winery and vineyard properties	$ 12,042,000	$ 0
Mortgage notes and related accrued interest receivable, net	364,412,000		325,097,000
Investments in direct financing leases, net	234,875,000		233,619,000
Finance lease investment weighted average interest rate	12.02%
Minimum interest on investments in direct finance lease	11.93%
Maximum interest on investments in direct finance lease	12.38%
Notes receivable and related accrued interest receivable, net	4,989,000		5,015,000
Long-term debt	1,224,840,000		1,154,295,000
Fixed Rate Mortgage Notes Receivable [Member]
Mortgage notes and related accrued interest receivable, net	364,400,000
Weighted average interest rate of mortgage notes receivable	7.82%
Receivable interest rate minimum	7.00%
Receivable interest rate maximum	10.46%
Weighted market rate used for determining future cash flow for notes receivable	9.15%
Fair value of notes receivable	338,800,000
Fixed Rate Notes Receivable [Member]
Receivable interest rate minimum	6.00%
Receivable interest rate maximum	15.00%
Fair value of notes receivable	4,800,000
Notes receivable and related accrued interest receivable, net	5,000,000
Weighted average interest rate of note receivable	8.44%
Estimated market rate used for determining discounted cash flow for fixed rate notes	9.40%
Variable Rate Debt [Member]
Long-term debt	308,600,000
Long-term debt, weighted average interest rate	1.92%
Variable Rate Converted to Fixed Rate [Member]
Long-term debt	240,000,000
Fixed Rate Debt [Member]
Long-term debt	916,200,000
Long-term debt, weighted average interest rate	6.56%
Weighted market rate for determining fair value of debt	5.35%
Fair value of debt	950,100,000
Fair Value, Measurements, Nonrecurring [Member]
Rental properties, net	43,233,000
Asset impairment charges relating to winery and vineyard properties	12,000,000
Fair Value, Measurements, Recurring [Member]
Asset impairment charges relating to winery and vineyard properties	800,000
Fair Value, Inputs, Level 3 [Member]
Rental properties, net	47,100,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Rental properties, net	43,233,000
Vineyard And Winery Facility Member
Asset impairment charges relating to winery and vineyard properties	$ 12,800,000