Subsequent Events (Details) - USD ($) $ in Thousands				12 Months Ended
	Feb. 17, 2016	Feb. 04, 2016	Feb. 01, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Subsequent Event [Line Items]
Repayment of mortgage notes payable				$ 88,806	$ 474	$ 72,853
Subsequent Event
Subsequent Event [Line Items]
OP units converted to common stock (in shares)			2,515,406
Shares issued (in shares)			2,515,406
Duane Reade | Held-for-sale Property | Subsequent Event
Subsequent Event [Line Items]
Contract price		$ 12,600
Repayment of mortgage notes payable		$ 8,400
1623 Kings Highway | Held-for-sale Property | Subsequent Event
Subsequent Event [Line Items]
Contract price	$ 17,000
Repayment of mortgage notes payable	$ 7,300