Schedule of Minimum Future Base Rents from Non-cancelable Leases (Detail) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
2019	[1]	$ 29,055
2019			$ 56,494
2020		53,229	50,291
2021		47,842	45,357
2022		32,459	30,089
2023		26,691	24,972
Thereafter		71,569	67,288
Total minimum base rents		$ 260,845	$ 274,491

[1] Represents the remaining six months of 2019.