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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign | For the years ended December 31, 2024, 2023 and 2022, income before income taxes is broken out between U.S. and foreign-sourced operations and consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
Domestic | ​ | $ | 93,687 | ​ | $ | 60,935 | ​ | $ | 77,562
Foreign | ​ |  | 56,306 | ​ |  | 51,154 | ​ |  | 5,067
Total | ​ | $ | 149,993 | ​ | $ | 112,089 | ​ | $ | 82,629
Schedule of Components of Income Tax Expense (Benefit) | The components of the provision for income taxes for the years ended December 31, 2024, 2023 and 2022, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
Current expense: |  | ​ |  |  | ​ |  |  | ​ |
Federal | ​ | $ | 26,061 | ​ | $ | 15,684 | ​ | $ | 9,584
State | ​ |  | 5,286 | ​ |  | 3,775 | ​ |  | 3,162
Foreign | ​ |  | 13,162 | ​ |  | 10,862 | ​ |  | 10,291
Total current expense | ​ |  | 44,509 | ​ |  | 30,321 | ​ |  | 23,037
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred expense (benefit): | ​ |  |  | ​ |  |  | ​ |  |
Federal | ​ |  | (12,609) | ​ |  | (11,030) | ​ |  | (10,438)
State | ​ |  | (1,421) | ​ |  | (1,699) | ​ |  | (3,615)
Foreign | ​ |  | (843) | ​ |  | 86 | ​ |  | (871)
Total deferred benefit | ​ |  | (14,873) | ​ |  | (12,643) | ​ |  | (14,924)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income tax expense | ​ | $ | 29,636 | ​ | $ | 17,678 | ​ | $ | 8,113
Schedule of Effective Income Tax Rate Reconciliation | The difference between the income tax expense reported and amounts computed by applying the statutory federal rate of 21.0% to pretax income for the years ended December 31, 2024, 2023 and 2022, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
Computed federal income tax expense at applicable statutory rate of 21% | ​ | $ | 31,499 | ​ | $ | 23,539 | ​ | $ | 17,352
State income tax expense | ​ |  | 3,081 | ​ |  | 1,627 | ​ |  | 35
Tax credits | ​ |  | (3,004) | ​ |  | (2,412) | ​ |  | (1,978)
Tax effect of international items | ​ |  | (1,870) | ​ |  | (3,994) | ​ |  | (10,698)
Uncertain tax positions | ​ |  | 218 | ​ |  | 4 | ​ |  | (47)
Deferred compensation insurance assets | ​ |  | (535) | ​ |  | (548) | ​ |  | 706
Stock-based compensation | ​ |  | (1,817) | ​ |  | (3,001) | ​ |  | (3,423)
Valuation allowance | ​ | ​ | — | ​ | ​ | (90) | ​ | ​ | 3,523
Remeasurement of state deferred taxes | ​ | ​ | — | ​ | ​ | (73) | ​ | ​ | (375)
Non-deductible expenses | ​ | ​ | 2,454 | ​ | ​ | 2,101 | ​ | ​ | 2,027
Remeasurement of contingent consideration liabilities | ​ | ​ | 108 | ​ | ​ | 317 | ​ | ​ | 1,061
Other — including the effect of graduated rates | ​ |  | (498) | ​ |  | 208 | ​ |  | (70)
Total income tax expense | ​ | $ | 29,636 | ​ | $ | 17,678 | ​ | $ | 8,113
​
Schedule of Deferred Tax Assets and Liabilities | Deferred income tax assets and liabilities at December 31, 2024 and 2023, consisted of the following temporary differences and carry-forward items (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023
Deferred income tax assets: |  | ​ |  |  | ​ |
Allowance for credit losses on trade receivables | ​ | $ | 2,215 | ​ | $ | 2,009
Accrued compensation expense | ​ |  | 11,701 | ​ |  | 10,285
Inventory differences | ​ |  | 5,139 | ​ |  | 5,477
Net operating loss carryforwards | ​ |  | 8,320 | ​ |  | 10,007
Stock-based compensation expense | ​ |  | 7,569 | ​ |  | 7,913
Operating lease assets | ​ | ​ | 11,586 | ​ | ​ | 11,331
State R&D tax credits | ​ | ​ | 5,924 | ​ | ​ | 5,237
IRC section 174 capitalized R&D | ​ | ​ | 35,200 | ​ | ​ | 26,370
Other | ​ |  | 10,759 | ​ |  | 10,159
Total deferred income tax assets | ​ |  | 98,413 | ​ |  | 88,788
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax liabilities: | ​ |  |  | ​ |  |
Prepaid expenses | ​ |  | (1,277) | ​ |  | (1,123)
Property and equipment | ​ |  | (22,699) | ​ |  | (23,539)
Intangible assets | ​ |  | (29,440) | ​ |  | (34,613)
Foreign withholding tax | ​ |  | (1,681) | ​ |  | (2,005)
Operating lease liabilities | ​ | ​ | (11,737) | ​ | ​ | (10,129)
Other | ​ |  | (1,632) | ​ |  | (1,898)
Total deferred income tax liabilities | ​ |  | (68,466) | ​ |  | (73,307)
Valuation allowance | ​ |  | (14,143) | ​ |  | (13,740)
Net deferred income tax liabilities | ​ | $ | 15,804 | ​ | $ | 1,741
​ | ​ | ​ | ​ | ​ | ​ | ​
Reported as: | ​ |  |  | ​ |  |
Deferred income tax assets | ​ | $ | 16,044 | ​ | $ | 7,288
Deferred income tax liabilities | ​ |  | (240) | ​ |  | (5,547)
Net deferred income tax liabilities | ​ | $ | 15,804 | ​ | $ | 1,741
Schedule of reconciliation of the beginning and ending amount of liabilities associated with uncertain tax benefits | A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax benefits for the years ended December 31, 2024, 2023 and 2022, consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
Unrecognized tax benefits, opening balance | ​ | $ | 1,622 | ​ | $ | 1,576 | ​ | $ | 1,635
Gross increases (decreases) in tax positions taken in a prior year | ​ |  | 70 | ​ |  | 112 | ​ |  | (10)
Gross increases in tax positions taken in the current year | ​ |  | 559 | ​ |  | 442 | ​ |  | 294
Lapse of applicable statute of limitations | ​ |  | (371) | ​ |  | (508) | ​ |  | (343)
Unrecognized tax benefits, ending balance | ​ | $ | 1,880 | ​ | $ | 1,622 | ​ | $ | 1,576

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