Annual report pursuant to Section 13 and 15(d)

Intangible Assets and Goodwill - Definite Life Intangible Assets (Detail)

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Intangible Assets and Goodwill - Definite Life Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Less accumulated amortization $ (11,985) $ (11,342)
Definite life intangibles, net 5,333 5,976
Favorable Lease Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Definite life intangibles, gross $ 17,318 $ 17,318