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Income Taxes - Summary of Changes in Deferred Tax Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
Deferred tax valuation allowance, Beginning Balance | $ 2,200 us-gaap_DeferredTaxAssetsValuationAllowance | $ 2,086 us-gaap_DeferredTaxAssetsValuationAllowance | $ 3,077 us-gaap_DeferredTaxAssetsValuationAllowance
Additions | 17 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense | 801 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense | 11 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Deductions | (574)us-gaap_ValuationAllowancesAndReservesDeductions | (712)us-gaap_ValuationAllowancesAndReservesDeductions | (1,066)us-gaap_ValuationAllowancesAndReservesDeductions
Translation adjustments | (78)us-gaap_ValuationAllowancesAndReservesAdjustments | 25 us-gaap_ValuationAllowancesAndReservesAdjustments | 64 us-gaap_ValuationAllowancesAndReservesAdjustments
Deferred tax valuation allowance, Ending Balance | $ 1,565 us-gaap_DeferredTaxAssetsValuationAllowance | $ 2,200 us-gaap_DeferredTaxAssetsValuationAllowance | $ 2,086 us-gaap_DeferredTaxAssetsValuationAllowance

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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