Schedule of Minimum Future Base Rents from Non-cancelable Leases (Detail) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
2019	[1]	$ 14,292
2019			$ 56,494
2020		54,746	50,291
2021		48,989	45,357
2022		33,701	30,089
2023		27,578	24,972
Thereafter		73,525	67,288
Total minimum base rents		$ 252,831	$ 274,491

[1] Represents the remaining three months of 2019.