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Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property, Plant and Equipment [Line Items] |  |  |
Restricted cash and cash equivalents | $ 3,600,000 | $ 1,200,000 |
Period for inventory write-down | 24 months |  |
Depreciation | $ 28,000,000 | 27,000,000 | $ 26,900,000
Goodwill, Impairment Loss | 0 | 0 | 0
Income tax benefit | $ 4,440,000 | 3,375,000 | 2,896,000
Buildings | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful lives | 20 years |  |
Buildings | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful lives | 40 years |  |
Machinery and equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful lives | 3 years |  |
Machinery and equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful lives | 10 years |  |
Accounting Standards Update 2016-09 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Income tax benefit | $ 8,300,000 |  |
Accounting Standards Update 2016-16 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cumulative effect of the adoption of ASU 2016-16 (Note 1) | (6,230,000) |  |
Accounting Standards Update 2016-18 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Decrease in financing cash flows | 2,500,000 | 1,500,000 | 300,000
Accounting Standards Update 2017-07 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Decrease in operating income | (3,400,000) | $ (3,500,000) |
Increase in operating income |  |  | $ 400,000
Pro Forma | Accounting Standards Update 2016-02 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | $ 45,900,000 |  |

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