Mortgage Note Payable (Schedule of Mortgage Notes Payable) (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended		12 Months Ended
	Mar. 31, 2013	Feb. 14, 2013	Dec. 31, 2012	Mar. 31, 2013 Mortgages [Member]		Dec. 31, 2012 Mortgages [Member]		Mar. 31, 2013 Minimum [Member] Mortgages [Member]	Dec. 31, 2012 Minimum [Member] Mortgages [Member]	Mar. 31, 2013 Maximum [Member] Mortgages [Member]	Dec. 31, 2012 Maximum [Member] Mortgages [Member]
Mortgage Loans on Real Estate [Line Items]
Encumbered Properties				164		164
Outstanding Loan Amount	$ 265,118		$ 265,118	$ 265,118		$ 265,118
Debt, Weighted Average Interest Rate				4.28%	[1]	4.28%	[1]
Debt, Weighted Average Maturity Term				5 years 3 months 7 days	[2]	5 years 6 months 4 days	[2]
Effective interest rate		0.00%						3.32%	3.32%	6.13%	6.13%

[1] (1)Mortgage notes payable have fixed rates. Effective interest rates range from 3.32% to 6.13% at March 31, 2013 and 3.32% to 6.13% at December 31, 2012.

[2] (2)Weighted average remaining years until maturity as of March 31, 2013 and December 31, 2012, respectively.