Shareholders' Equity - Components of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Other Comprehensive (Loss) Income | $ 2,142 | $ (430) | $ (3,115) |
| Foreign Currency Translation Adjustments | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Other Comprehensive (Loss) Income | 4,132 | (626) | (4,617) |
| Retirement Liability Adjustment | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Other Comprehensive (Loss) Income | (1,990) | 196 | 1,502 |
| Other Comprehensive (Loss) Income, Before Tax | (2,377) | 301 | 2,311 |
| Tax Benefit (Expense) | $ 387 | $ (105) | $ (809) |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount before tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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