Mortgage Note Payable (Schedule of Mortgage Notes Payable) (Details) (USD $) In Thousands, unless otherwise specified				6 Months Ended		12 Months Ended
	Jun. 30, 2013	Feb. 14, 2013	Dec. 31, 2012	Jun. 30, 2013 Mortgages [Member]		Dec. 31, 2012 Mortgages [Member]		Jun. 30, 2013 Minimum [Member] Mortgages [Member]	Dec. 31, 2012 Minimum [Member] Mortgages [Member]	Jun. 30, 2013 Maximum [Member] Mortgages [Member]	Dec. 31, 2012 Maximum [Member] Mortgages [Member]
Mortgage Loans on Real Estate [Line Items]
Encumbered Properties				165		164
Outstanding Loan Amount	$ 269,918		$ 265,118	$ 269,918		$ 265,118
Debt, Weighted Average Interest Rate				4.25%	[1]	4.28%	[1]
Debt, Weighted Average Maturity Term				4 years 11 months 25 days	[2]	5 years 6 months 3 days	[2]
Effective interest rate		0.00%						2.73%	3.32%	6.13%	6.13%

[1] (1)Mortgage notes payable have fixed rates or are fixed by way of interest rate swap arrangements. Effective interest rates range from 2.73% to 6.13% at June 30, 2013 and 3.32% to 6.13% at December 31, 2012.

[2] (2)Weighted average remaining years until maturity as of June 30, 2013 and December 31, 2012, respectively.