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Long-Term Debt - Additional Information (Detail) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2015 USD ($) | Aug. 30, 2015 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 EUR (€) | Jul. 31, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt issuance costs incurred |  |  | $ 682,000 | $ 445,000 |  |  |
Cash paid to interest |  |  | 800,000 | 800,000 | $ 700,000 |  |
Italy [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 6,700,000 | 7,000,000.0 |  | € 5,800,000 |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument term (in years) |  |  | 5 years |  |  |  |
Maximum borrowing capacity | $ 125,000,000 |  |  |  |  |  |
Credit agreement maturity date |  |  | Aug. 31, 2020 |  |  |  |
Amount outstanding under lines of credit |  |  | $ 0 |  |  |  |
Maximum borrowing capacity available for issuance of letters of credit | 25,000,000 |  |  |  |  |  |
Maximum additional borrowing capacity | $ 50,000,000 |  |  |  |  |  |
Line of credit, leverage ratio | 3.0 |  |  |  |  |  |
Line of credit, interest coverage ratio | 300.00% |  |  |  |  |  |
Debt issuance costs incurred |  | $ 1,800,000 |  |  |  |  |
Debt issuance costs, net of accumulated amortization |  |  | 600,000 | 1,000,000.0 |  |  |
Debt issuance costs amortized or expensed |  |  | $ 400,000 | $ 1,000,000.0 | $ 400,000 |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity available for working capital and other general corporate purposes | $ 50,000,000 |  |  |  |  |  |
Line of credit facility, unused commitment fee percentage | 0.40% |  |  |  |  |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Margin on variable rate | 2.50% |  |  |  |  |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Margin on variable rate | 1.50% |  |  |  |  |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, unused commitment fee percentage | 0.25% |  |  |  |  |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | LIBOR [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Margin on variable rate | 1.75% |  |  |  |  |  |
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Margin on variable rate | 0.75% |  |  |  |  |  |
First Amended and Restated Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum percentage of voting interests pledged in first tier foreign subsidiaries |  |  |  |  |  |  | 65.00%

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- Definition Line of credit facility maximum capacity available for issuance of letter of credit. + References No definition available. + Details
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- Definition Maximum percentage of voting interests pledged in first tier foreign subsidiaries. + References No definition available. + Details
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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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