Schedule of Net Book Value of Intangibles (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets And Liabilities [Line Items]
Less: accumulated amortization, assets		$ (120,188)	$ (74,895)
Intangible assets, net		131,502	172,452
Less: accumulated amortization, liabilities		4,247	2,581
In-place lease intangibles
Finite-Lived Intangible Assets And Liabilities [Line Items]
Gross carrying amount, assets		225,246	220,917
Above-market lease intangibles
Finite-Lived Intangible Assets And Liabilities [Line Items]
Gross carrying amount, assets		13,974	13,960
Gross carrying amount, liabilities		(3,488)	(3,488)
Below-market ground lease intangibles
Finite-Lived Intangible Assets And Liabilities [Line Items]
Gross carrying amount, assets		12,470	12,470
Gross carrying amount, liabilities		(12,060)	(12,095)
Other liabilities
Finite-Lived Intangible Assets And Liabilities [Line Items]
Intangible liabilities, net	[1]	$ (11,301)	$ (13,002)

[1] Intangible liabilities, net are included in other liabilities in the accompanying consolidated balance sheets.