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Amortizable Intangible Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]    
Lease agreements (net of accumulated amortization of $8,485 and $6,936) $ 7,420 $ 8,969
Finite Lived Intangible Liabilities Net, Total $ 7,420 $ 8,969