Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate and Accumulated Depreciation (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Real Estate
Beginning Balance	$ 294,827,000	$ 233,060,000
Acquisitions	91,669,000	55,514,000
Improvements	11,105,000	6,430,000
Disposal of Assets	(3,971,000)	(177,000)
Ending Balance	393,630,000	294,827,000	$ 233,060,000
Reconciliation of Accumulated Depreciation
Beginning Balance	53,233,000	42,557,000
Current Expense	8,790,000	7,602,000
Impairment	500,000	3,175,000	611,000
Disposal of Assets	(482,000)	(101,000)
Ending Balance	$ 62,041,000	$ 53,233,000	$ 42,557,000