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Purchase of Additional Ownership Interest in Joint Ventures - Additional Information (Detail) - Carrier Enterprise II - USD ($) $ in Thousands | Feb. 13, 2017 | Nov. 29, 2016 | Jul. 31, 2011
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Additional ownership interest acquired | 10.00% | 10.00% |
Cash consideration | $ 42,688 | $ 42,909 |
Controlling interest, ownership percentage | 80.00% |  | 60.00%

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