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Income Taxes - Additional Information (Detail) € in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017 USD ($) | Jan. 01, 2018 USD ($) | Dec. 31, 2017 EUR (€)
Income Taxes [Line Items] |  |  |  |  |
Effective tax rate | 24.70% | 24.60% |  |  |
U.S. statutory tax rate | 21.00% | 34.00% | 35.00% |  |
Net operating loss carry forwards, expiration description |  |  | Expire at various dates through December 2037. |  |
Business tax credits carry forwards, expiration description |  |  | Expire at various dates through December 2037. |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  | $ 12,812 |  |
Tax cuts and jobs Act, increased tax provision on undistributed and previously untaxed post-1986 earnings and profits of the specified foreign corporation |  |  | 3,266 |  |
Accounting Standards Update 2016-06 | Other Assets |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Impact on assets and liabilities due to change in accounting principle |  |  |  | $ 5,609 |
Accounting Standards Update 2016-06 | Deferred Tax Liabilities |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Impact on assets and liabilities due to change in accounting principle |  |  |  | 4,932 |
Accounting Standards Update 2016-06 | Accumulated Deficit |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Impact on assets and liabilities due to change in accounting principle |  |  |  | $ 677 |
Domestic Tax Authority |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Business tax credits carry forwards |  |  | 297 |  |
State |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Business tax credits carry forwards |  |  | 99 |  |
United States |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating loss carry forwards |  |  | 19,652 |  |
Germany |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating loss carry forwards |  |  | $ 743 |  | € 603

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 + Details
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