Other Liabilities - Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities
Dividends and distributions payable	$ 9,727	$ 7,621
Deferred ground rent payable	8,202	7,484
Acquired lease intangibles, net	15,545	5,872
Prepaid rent and other	3,227	2,145
Security deposits	1,679	1,267
Interest rate swaps	829	1,082
Other liabilities	$ 39,209	$ 25,471