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Acquisitions - Additional Information (Detail) |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 03, 2016 USD ($) | Oct. 03, 2016 BRL | Sep. 30, 2017 USD ($) | Jun. 13, 2017 ft² T | Mar. 31, 2017 USD ($) | Mar. 31, 2017 BRL | Dec. 31, 2016 USD ($) | Oct. 03, 2016 BRL
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Paid from cash on hand |  |  | $ 4,339,000 |  |  |  |  |
Goodwill |  |  | $ 25,724,000 |  |  |  | $ 25,308,000 |
Tebras And PBC [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | $ 14,207,000 |  |  |  |  |  |  |
Acquisition of intangible assets | 7,354,000 |  |  |  |  |  |  |
Tebras And PBC [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition of intangible assets | 4,331,000 |  |  |  |  |  |  |
Amortization periods for the identifiable intangible assets at the time of acquisition |  |  | 13 years |  |  |  |  |
Tebras And PBC [Member] | Supply Contract [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition of intangible assets | 2,555,000 |  |  |  |  |  |  |
Amortization periods for the identifiable intangible assets at the time of acquisition |  |  | 4 years |  |  |  |  |
Tebras And PBC [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition of intangible assets | 468,000 |  |  |  |  |  |  |
Amortization periods for the identifiable intangible assets at the time of acquisition |  |  | 5 years |  |  |  |  |
Tebras And PBC [Member] | Before purchase accounting adjustments [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | 14,327,000 |  |  |  |  |  |  |
Tebras And PBC [Member] | After purchase accounting adjustments [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | 14,207,000 |  |  |  |  |  |  |
Tebras And PBC [Member] | Surfactants [Member] | Brazil [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Original purchase price of the acquisitions | 29,075,000 |  |  |  |  |  |  | BRL 93,309,000
Paid from cash on hand | 21,812,000 | BRL 70,000,000 |  |  |  |  |  |
Deposited in escrow | 2,804,000 |  |  |  |  |  |  | 9,000,000
Unpaid working capital adjustments | $ 4,459,000 |  |  |  |  |  |  | BRL 14,309,000
Working capital adjustment amount paid |  |  |  |  | $ 4,339,000 | BRL 13,925,000 |  |
Adjusted purchase price of the acquisitions |  |  |  |  | $ 28,955,000 | BRL 92,925,000 |  |
2017 Acquisition Agreement [Member] | BASF Mexicana, S.A. DE C.V. [Member] | Surfactants [Member] | Ecatepec, Mexico [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Capacity of production facility expected to be acquired | T |  |  |  | 50,000 |  |  |  |
Warehouse space, laboratory and office space currently expected to be acquired | ft² |  |  |  | 124,000 |  |  |  |

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