Summary of Significant Accounting Policies (Summary of Supplemental Cash Flow Information) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Summary of Significant Accounting Policies [Abstract]
Cash paid for interest	$ 353	$ 97
Distributions declared	1,826	1,562
Commissions and other offering costs accrued but not paid	130	307
Subscription receivable	30	(104)
Value of shares issued from distribution reinvestment program	820	693
Issuance of subordinated profits interests in exchange for investment in unconsolidated affiliated entity		500
Note receivable received in connection with disposition of investment in unconsolidated affiliated entity		$ 2,400