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Inventories (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Inventory [Line Items] |  |
Inventories | $ 172,485 | $ 68,601
Refrigerant and cylinders |  |
Inventory [Line Items] |  |
Inventories | 22,322 | 11,168
Packaged refrigerants |  |
Inventory [Line Items] |  |
Inventories | $ 150,163 | $ 57,433

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