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Investment in Non-Consolidated Joint Venture - Summarized Balance Sheet Information for Joint Venture (Detail) - Joint Venture [Member] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Current assets $ 31,295 $ 24,663
Non-current assets 22,522 22,847
Total assets 53,817 47,510
Current liabilities 13,549 11,171
Total liabilities $ 13,549 $ 11,171