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Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of income taxes at the United States Federal statutory rate to the effective income tax rate |  |  |
Effective Federal income tax rate | 11.60% |  |
Income taxes at the United States statutory rate | $ 58,506 | $ 43,026 | $ 25,290
State income taxes | 1,033 | 1,075 | 387
Effect of change in valuation allowance | 1,978 | 680 | (1,443)
Foreign income tax rate differentials | 329 | 289 | 152
Stock based compensation | (6,718) | (3,818) | (3,658)
Internal revenue code section 162(m) limitation | 4,488 | 2,692 | 1,481
Credit expirations | 784 | 1,181 | 2,342
Rate change | 44 | 94 | 159
Credit generation | (6,900) | (4,764) | (3,096)
Discrete items, net | 2,161 | 206 | 72
GILTI inclusion | 45 | 69 | 301
Foreign-derived intangible income | (24,052) | (20,526) |
Other, net | 638 | 1,602 | (209)
Income tax provision | $ 32,336 | $ 21,806 | $ 21,778

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets attributable to internal Revenue Code 162(m) limitation. + References No definition available. + Details
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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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- Definition Amount of reported income tax benefit from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to foreign-derived intangible income (FDII). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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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