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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2025
Income Tax Disclosure [Abstract] |
Components of Operating Income from Before Income Tax | The components of income before income taxes are as follows (in thousands):
|  | Year ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
United States |  | $ | 95,422 |  |  | $ | 72,823 |  |  | $ | 71,514 |
Foreign |  |  | 199,374 |  |  |  | 199,305 |  |  |  | 173,657 |
Income before income taxes |  | $ | 294,796 |  |  | $ | 272,128 |  |  | $ | 245,171 |
Components of Income Tax Expense | The components of income tax expense are as follows (in thousands):
|  | Year ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Current income tax expense: |  |  |  |  |  |  |  |  |
U.S. Federal |  | $ | 19,230 |  |  | $ | 34,199 |  |  | $ | 15,848 |
U.S. State |  |  | 1,965 |  |  |  | 3,452 |  |  |  | 3,048 |
Foreign |  |  | 32,562 |  |  |  | 31,515 |  |  |  | 27,030 |
|  |  | 53,757 |  |  |  | 69,166 |  |  |  | 45,926 |
Deferred income tax benefit: |  |  |  |  |  |  |  |  |
U.S. Federal |  |  | (388 | ) |  |  | (16,799 | ) |  |  | 460 |
U.S. State |  |  | 179 |  |  |  | (2,995 | ) |  |  | (3,936 | )
Foreign |  |  | (827 | ) |  |  | 677 |  |  |  | (290 | )
|  |  | (1,036 | ) |  |  | (19,117 | ) |  |  | (3,766 | )
Total income tax expense: |  |  |  |  |  |  |  |  |
U.S. Federal |  |  | 18,842 |  |  |  | 17,400 |  |  |  | 16,308 |
U.S. State |  |  | 2,144 |  |  |  | 457 |  |  |  | (888 | )
Foreign |  |  | 31,735 |  |  |  | 32,192 |  |  |  | 26,740 |
Total income tax expense |  | $ | 52,721 |  |  | $ | 50,049 |  |  | $ | 42,160 |
Reconciliation of the U.S. Federal Statutory Income Tax Rate Company's Effective Tax Rate | A reconciliation of the U.S. federal statutory income tax rate to the Company's effective tax rate is as follows (in thousands, except percentages):
|  | Year-ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | Amount |  |  | Percent |  |  | Amount |  |  | Percent |  |  | Amount |  |  | Percent |
U.S. tax effects: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal statutory income tax rate |  | $ | 61,907 |  |  |  | 21.0 | % |  | $ | 57,147 |  |  |  | 21.0 | % |  | $ | 51,486 |  |  |  | 21.0 | %
Domestic federal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
R&D credits |  |  | (4,295 | ) |  |  | -1.5 | % |  |  | (7,842 | ) |  |  | -2.8 | % |  |  | (6,239 | ) |  |  | -2.5 | %
Nontaxable and nondeductible items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Executive compensation disallowed under §162(m) |  |  | 4,348 |  |  |  | 1.5 | % |  |  | 4,193 |  |  |  | 1.5 | % |  |  | 4,072 |  |  |  | 1.7 | %
Other |  |  | 887 |  |  |  | 0.3 | % |  |  | 331 |  |  |  | 0.1 | % |  |  | 147 |  |  |  | 0.1 | %
Federal effect of cross-border tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Global intangible low-taxed income |  |  | 1,894 |  |  |  | 0.6 | % |  |  | 5,429 |  |  |  | 2.0 | % |  |  | 3,861 |  |  |  | 1.6 | %
Subpart F income |  |  | 462 |  |  |  | 0.2 | % |  |  | 2,835 |  |  |  | 1.0 | % |  |  | (746 | ) |  |  | -0.3 | %
Other |  |  | (89 | ) |  |  | 0.0 | % |  |  | (406 | ) |  |  | -0.1 | % |  |  | (245 | ) |  |  | -0.1 | %
Federal reconciling items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  | (3,644 | ) |  |  | -1.2 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other |  |  | 215 |  |  |  | 0.1 | % |  |  | (1,241 | ) |  |  | -0.5 | % |  |  | 410 |  |  |  | 0.2 | %
Changes in federal valuation allowances |  |  | (720 | ) |  |  | -0.2 | % |  |  | (67 | ) |  |  | -0.1 | % |  |  | (157 | ) |  |  | -0.1 | %
Domestic state and local income taxes, net of federal effect |  |  | 1,786 |  |  |  | 0.6 | % |  |  | 322 |  |  |  | 0.1 | % |  |  | (702 | ) |  |  | -0.3 | %
Foreign tax effects: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ireland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory income tax rate differential |  |  | (16,964 | ) |  |  | -5.8 | % |  |  | (16,580 | ) |  |  | -6.0 | % |  |  | (13,525 | ) |  |  | -5.5 | %
Foreign tax credits |  |  | (3,604 | ) |  |  | -1.2 | % |  |  | (2,964 | ) |  |  | -1.1 | % |  |  | (2,104 | ) |  |  | -0.9 | %
Other |  |  | (431 | ) |  |  | -0.2 | % |  |  | 167 |  |  |  | 0.1 | % |  |  | (105 | ) |  |  | 0.0 | %
China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Withholding tax on license fees and royalties |  |  | 10,587 |  |  |  | 3.6 | % |  |  | 9,225 |  |  |  | 3.4 | % |  |  | 6,185 |  |  |  | 2.5 | %
Other |  |  | (27 | ) |  |  | 0.0 | % |  |  | (24 | ) |  |  | 0.0 | % |  |  | (33 | ) |  |  | 0.0 | %
Other foreign jurisdictions |  |  | 409 |  |  |  | 0.1 | % |  |  | (476 | ) |  |  | -0.2 | % |  |  | (145 | ) |  |  | -0.1 | %
Total |  | $ | 52,721 |  |  |  | 17.9 | % |  | $ | 50,049 |  |  |  | 18.4 | % |  | $ | 42,160 |  |  |  | 17.2 | %
Summarizes the Company's cash Paid For Income Taxes, Net of Refunds Received by Jurisdiction | The following table summarizes the Company's c ash paid for income taxes, net of refunds received by jurisdiction (in thousands):
|  | December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
United States: |  |  |  |  |  |  |  |  |
Federal |  | $ | 33,507 |  |  | $ | 45,527 |  |  | $ | 57,263 |
State |  |  | 2,629 |  |  |  | 2,545 |  |  |  | 2,523 |
Total United States |  |  | 36,136 |  |  |  | 48,072 |  |  |  | 59,786 |
Foreign: |  |  |  |  |  |  |  |  |
Ireland |  |  | 24,127 |  |  |  | 13,174 |  |  |  | 28,110 |
China |  |  | 10,783 |  |  |  | 9,236 |  |  |  | 6,161 |
Other foreign jurisdictions |  |  | 392 |  |  |  | 1,491 |  |  |  | 2,119 |
Total foreign |  |  | 35,302 |  |  |  | 23,901 |  |  |  | 36,390 |
Total cash taxes paid |  | $ | 71,438 |  |  | $ | 71,973 |  |  | $ | 96,176 |
Tax Loss and Tax Credit Carryforwards | The following table summarizes the Company's tax credit carry forwards for tax return purposes as of December 31, 2025 (in thousands):
|  | Tax Benefit |  |  | Expiration Date
Tax credit carry forwards: |  |  |  |  |
U.S. State research tax credits |  | $ | 9,628 |  |  | 2036-2040
Total credit carry forwards |  | $ | 9,628 |  |  |
Significant Components of Deferred Tax Assets and Liabilities | Significant components of the Company's net deferred tax assets and liabilities are as follows (in thousands):
|  | December 31, |
|  | 2025 |  |  | 2024 |
Deferred tax asset: |  |  |  |  |  |
Capitalized research expenditures |  | $ | 54,931 |  |  | $ | 55,277 |
Retirement plan |  |  | 14,185 |  |  |  | 13,633 |
Tax credit carry forwards |  |  | 9,628 |  |  |  | 9,542 |
Accruals and reserves |  |  | 7,100 |  |  |  | 6,988 |
Lease liabilities |  |  | 5,874 |  |  |  | 6,073 |
Stock-based compensation |  |  | 1,701 |  |  |  | 1,475 |
Deferred revenue |  |  | 588 |  |  |  | 655 |
Other |  |  | 3,706 |  |  |  | 2,783 |
|  |  | 97,713 |  |  |  | 96,426 |
Valuation allowance |  |  | (9,159 | ) |  |  | (10,167 | )
Deferred tax assets |  |  | 88,554 |  |  |  | 86,259 |
Deferred tax liability: |  |  |  |  |  |
Lease assets |  |  | (4,891 | ) |  |  | (5,297 | )
Acquisition goodwill |  |  | (2,088 | ) |  |  | (1,854 | )
Other |  |  | (2,121 | ) |  |  | (788 | )
Deferred tax liabilities |  |  | (9,100 | ) |  |  | (7,939 | )
Net deferred tax assets |  | $ | 79,454 |  |  | $ | 78,320 |

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