Investment in Non-Consolidated Joint Venture - Summarized Balance Sheet Information for Joint Venture (Detail) - Joint Venture [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Current assets	$ 31,452	$ 24,663
Non-current assets	23,570	22,847
Total assets	55,022	47,510
Current liabilities	11,620	11,171
Total liabilities	$ 11,620	$ 11,171