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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |  |
Long-term net deferred tax liabilities | $ 19,954 | $ 21,932 |  |
Operating loss carryforwards related to a prior acquisition | 3,400 |  |  |
U.S. federal and state capital loss carryforwards | 1,200 |  |  |
Valuation allowance | 1,237 | 2,274 | $ 2,574 | $ 2,686
Unremitted earnings | 25,600 |  |  |
Unrecognized tax benefits | $ 28 | 345 | $ 799 | $ 806
Income tax expense to settle a foreign tax audit |  | 300 |  |
U.S. Federal [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards, limitations on use | The U.S. federal net operating loss carryforwards resulting from taxable years beginning after December 31, 2017 can be carried forward indefinitely and can be used to offset 80% of U.S. taxable income. |  |  |
Foreign Tax Authority [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | $ 27,600 |  |  |
Other Assets [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Long-term net deferred tax assets | 1,600 | 1,000 |  |
Non-current Liabilities [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Long-term net deferred tax liabilities | $ 21,500 | $ 22,900 |  |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws, attributable to a prior acquisition. + References No definition available. + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + 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(26)(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 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(15)(b)(2)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: 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(15)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 5: 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(26)(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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