Organization and Summary of Significant Accounting Policies (Summary of Intangible Assets and Liabilities, Net of Accumulated Amortization) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 12,619	$ 12,444
Goodwill	5,249	5,249	$ 5,249	$ 5,249
Total intangible assets	17,868	17,693
Below-market lease intangibles	(403)	(636)
Above market ground lease liability	5,484	5,590
Intangible liabilities	5,887	6,226
Value of in-place lease intangibles [Member]
Goodwill And Intangible Assets [Line Items]
Subtotal	12,594	12,369
Above-market lease intangibles [Member]
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 25	$ 75