Schedule of Other Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Other Assets [Line Items]
Debt issuance costs, accumulated amortization	$ 1,633	$ 542
Intangible lease value
Schedule of Other Assets [Line Items]
Intangible assets, accumulated amortization	4,990	3,118
Other intangible assets
Schedule of Other Assets [Line Items]
Intangible assets, accumulated amortization	$ 1,421	$ 363