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Business Restructuring - Reconciliation of Restructuring Liabilities (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2017 | [1] | Sep. 30, 2018 | Sep. 30, 2017 | [1]
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Expense recognized | $ 1,715 |  |  | $ 426 | $ 2,346 | $ 1,798
Canada [Member] |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Restructuring liability | 452 | $ 493 | $ 691 |  | 691 |
Expense recognized | 305 | 273 | 358 |  |  |
Amounts paid | (367) | (305) | (549) |  |  |
Foreign currency translation | 7 | (9) | (7) |  |  |
Restructuring liability | 397 | 452 | 493 |  | 397 |
Canada [Member] | Termination Benefits [Member] |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Restructuring liability | 363 | 449 | 592 |  | 592 |
Amounts paid | (61) | (79) | (140) |  |  |
Foreign currency translation | 6 | (7) | (3) |  |  |
Restructuring liability | 308 | 363 | 449 |  | 308 |
Canada [Member] | Other Expense [Member] |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Restructuring liability | 89 | 44 | 99 |  | 99 |
Expense recognized | 305 | 273 | 358 |  |  |
Amounts paid | (306) | (226) | (409) |  |  |
Foreign currency translation | 1 | (2) | (4) |  |  |
Restructuring liability | $ 89 | $ 89 | $ 44 |  | $ 89 |
[1] | The 2017 data has been immaterially changed from the amounts originally reported as a result of the Company’s first quarter 2018 adoption of ASU No. 2017-7, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

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