Real Estate Acquired - Amortization of Intangible Assets and Deferred Income Related to in Place Leases (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Below market leases
2018	$ 1,652
2019	1,515
2020	1,433
2021	1,409
2022	1,306
Thereafter	6,029
Total	13,344
Lease acquisition costs
Finite-Lived Intangible Assets [Line Items]
2018	982
2019	780
2020	653
2021	530
2022	390
Thereafter	1,547
Total	4,882
Above market leases
Finite-Lived Intangible Assets [Line Items]
2018	33
2019	33
2020	33
2021	33
2022	33
Thereafter	409
Total	$ 574