Non-controlling Interest - Operating Partnership - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Noncontrolling Interest
Non-controlling interest related to the outstanding of OP Units	1,425,000	1,425,000	1,425,000
Non-controlling interest in Operating Partnership	1.30%	1.30%	1.30%
Rebalancing of ownership percentage of non-controlling interest		$ 1
Additional Paid in Capital
Noncontrolling Interest
Rebalancing of ownership percentage of non-controlling interest	$ (3,600)	3,916
Non-controlling Interest
Noncontrolling Interest
Rebalancing of ownership percentage of non-controlling interest	3,600	(3,917)
Distribution payable	$ 584	$ 584	$ 570