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Income Taxes - Effective Income Tax Rate Differs from Federal Statutory Rate (Detail) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |  |
Tax provision computed at the federal statutory rate | 21.00% | 21.00% | 21.00% | 21.00%
State income tax provision, net of federal benefit | 1.34% | 2.60% | 13.33% |
Federal research credits | 3.26% | 6.74% | 53.77% |
Foreign taxes | 3.52% | 6.29% | (4.69%) |
Tax-exempt income | 0.06% | 0.21% | 3.75% |
Change in valuation allowance | (35.19%) | 63.92% | (75.26%) |
Non-deductible transaction costs |  | (2.74%) | (39.48%) |
Foreign tax credits | 2.45% | (0.40%) | 0.14% |
Stock-based compensation | (0.57%) | (2.09%) | 10.74% |
Withholding taxes | 0.01% | 0.03% | 0.14% |
Alabama law change |  |  | (25.39%) |
Adtran Networks tax exempt income | 1.42% |  |  |
Return to accrual | 0.62% | 0.24% | 9.48% |
Global intangible low-taxed income ("GILTI") | (5.87%) | (8.08%) | (4.29%) |
Adtran Networks Goodwill Impairment | (4.62%) |  |  |
Other, net | 0.40% | (0.24%) | (0.19%) |
Effective Tax Rate | 12.17% | 87.48% | (36.95%) |

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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/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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