Notes Payable - Information on Notes Payable (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Notes payable, net		$ 89,921	$ 142,332
Total debt		90,321	143,119	$ 143,119
Deferred financing fees, net		(400)	(787)	(787)
Notes payable, net of deferred financing fees		86,819	89,921	$ 142,332
Courtyard Kauai Coconut Beach Hotel
Debt Instrument [Line Items]
Notes payable, net		0	38,000
Notes payable, net of deferred financing fees		0
Gardens Medical Pavilion
Debt Instrument [Line Items]
Notes payable, net		0	12,899
Notes payable, net of deferred financing fees		$ 0
Interest rate (as a percent)		4.90%
Debt Instrument, Maturity Date		Jan. 01, 2018
River Club and the Townhomes at River Club
Debt Instrument [Line Items]
Notes payable, net		$ 23,511	23,917
Notes payable, net of deferred financing fees		$ 23,368
Interest rate (as a percent)		5.26%
Debt Instrument, Maturity Date		May 01, 2018
Lakes of Margate
Debt Instrument [Line Items]
Notes payable, net		$ 13,973	14,243
Notes payable, net of deferred financing fees		$ 13,384
Debt Instrument, Maturity Date		Jan. 01, 2020
Arbors Harbor Town
Debt Instrument [Line Items]
Notes payable, net		$ 24,153	24,653
Notes payable, net of deferred financing fees		$ 23,632
Interest rate (as a percent)		3.99%
Debt Instrument, Maturity Date		Jan. 01, 2019
22 Exchange
Debt Instrument [Line Items]
Notes payable, net		$ 18,963	19,307
Notes payable, net of deferred financing fees		$ 16,875
Interest rate (as a percent)		3.93%
Parkside
Debt Instrument [Line Items]
Notes payable, net	[1]	$ 9,721	$ 10,100
Notes payable, net of deferred financing fees	[1]	$ 9,560
Interest rate (as a percent)	[1]	5.00%
Debt Instrument, Maturity Date	[1]	Jun. 01, 2018
Minimum | Lakes of Margate
Debt Instrument [Line Items]
Interest rate (as a percent)		5.49%
Maximum | Lakes of Margate
Debt Instrument [Line Items]
Interest rate (as a percent)		5.92%

[1] Includes approximately $0.1 million of unamortized premium related to debt we assumed at acquisition