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Components of Accumulated Other Comprehensive Loss, Net (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Balance at beginning of year |  | $ 197,728 |  | $ 199,468 |  | $ 188,233
Balance at end of year |  | 210,279 |  | 197,728 |  | 199,468
Accumulated translation adjustment: |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Balance at beginning of year |  | (35,644) |  | (12,961) |  | (7,680)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | 7,823 |  | (23,061) |  | (5,281)
Amounts reclassified from accumulated other comprehensive loss | [1] |  |  | 378 |  |
Balance at end of year |  | (27,821) |  | (35,644) |  | (12,961)
Accumulated deferred gains (losses) on cash flow hedges: |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Balance at beginning of year |  | (3) | [2] | (20) | [2] | (18)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | 17 |  | 17 |  | (2)
Balance at end of year | [2] | 14 |  | (3) |  | (20)
Accumulated effect of retirement benefit obligations: |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Balance at beginning of year |  | (1,352) |  | (1,204) |  | (2,224)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | (228) |  | (202) |  | 941
Amounts reclassified from accumulated other comprehensive loss | [3] | 62 |  | 54 |  | 79
Balance at end of year |  | $ (1,518) |  | $ (1,352) |  | $ (1,204)
[1] | Amount is recorded in equity in earnings (losses) on the consolidated statements of operations.
[2] | Amount is recorded in selling, general and administrative expenses on the consolidated statements of operations.
[3] | No amounts were reclassified out of accumulated other comprehensive loss. Amounts reclassified would be recorded in interest expense on the consolidated statements of operations.

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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