Fair Value of Financial Instruments (Fair Value, by Balance Sheet Grouping) (Details) (Level 3, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Mortgage notes payable | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 172,482	$ 172,716
Mortgage notes payable | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	173,403	173,427
Credit facility | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	305,000	305,000
Credit facility | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	305,000	305,000
Preferred Equity Investment | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	33,600	30,000
Preferred Equity Investment | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 33,600	$ 30,000