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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Provision for Income Taxes | The provision (benefit) for income taxes for the years ended December 31, 2019, 2018 and 2017 consists of the following:
| 2019 |  | 2018 |  | 2017
Current tax expense: |  |  |  |  |
Federal | $ | 96 |  |  | $ | (1,077 | ) |  | $ | 1,744 |
State | 444 |  |  | 777 |  |  | 2,101 |
Foreign | 8,375 |  |  | 8,036 |  |  | 9,421 |
| 8,915 |  |  | 7,736 |  |  | 13,266 |
Deferred income tax expense (benefit): |  |  |  |  |
Federal | (3,970 | ) |  | 4,478 |  |  | (44,456 | )
State | (938 | ) |  | 62 |  |  | (1,036 | )
Foreign | (1,402 | ) |  | (2,477 | ) |  | 5,471 |
| (6,310 | ) |  | 2,063 |  |  | (40,021 | )
Provision (benefit) for income taxes | $ | 2,605 |  |  | $ | 9,799 |  |  | $ | (26,755 | )
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation between income taxes computed at the statutory federal rate and the provision (benefit) for income taxes for the years ended December 31, 2019, 2018 and 2017 follows:
| 2019 |  | 2018 |  | 2017
Tax provision at statutory rate based on income before income taxes | 21.0 | % |  | 21.0 | % |  | 35.0 | %
Stock-based compensation | (15.4 | ) |  | (1.6 | ) |  | (2.1 | )
Settlement of taxing authority examinations | (7.7 | ) |  | (0.7 | ) |  | (2.1 | )
Federal research credit | (4.0 | ) |  | (2.8 | ) |  | (2.8 | )
Tax treaty protocols | (2.9 | ) |  | — |  |  | — |
US tax on worldwide earnings at different rates | 7.9 |  |  | 2.9 |  |  | — |
Foreign income taxes | 6.4 |  |  | 3.6 |  |  | (5.3 | )
Non deductible/non-taxable items | 2.8 |  |  | (1.4 | ) |  | (1.0 | )
State income taxes, net of federal tax benefit | 0.3 |  |  | 1.6 |  |  | 2.8 |
International tax reform | — |  |  | (3.6 | ) |  | — |
US tax reform | — |  |  | 1.8 |  |  | (111.0 | )
Consolidated group restructuring | — |  |  | — |  |  | (7.4 | )
Other, net | (0.1 | ) |  | (1.5 | ) |  | 0.8 |
| 8.3 | % |  | 19.3 | % |  | (93.1 | )%
Schedule of Deferred Tax Assets and Liabilities | The tax effects of the significant temporary differences which comprise the deferred income tax assets and liabilities at December 31, 2019 and 2018 are as follows:
| 2019 |  | 2018
Assets: |  |  |
Inventory | $ | 4,085 |  |  | $ | 4,096 |
Net operating losses | 3,679 |  |  | 7,358 |
Capitalized research and development | 6,201 |  |  | 7,214 |
Deferred compensation | 2,102 |  |  | 2,085 |
Accounts receivable | 2,556 |  |  | 2,296 |
Compensation and benefits | 6,049 |  |  | 5,434 |
Accrued pension | 3,710 |  |  | 3,205 |
Research and development credit | 10,321 |  |  | 8,585 |
Interest limitation | 5,702 |  |  | — |
Convertible notes hedge | 9,004 |  |  | — |
Lease liabilities | 5,688 |  |  | — |
Other | 4,336 |  |  | 2,235 |
Less: valuation allowances | (1,732 | ) |  | (1,159 | )
| 61,701 |  |  | 41,349 |
Liabilities: |  |  |  |
Goodwill and intangible assets | 102,015 |  |  | 100,108 |
Depreciation | 301 |  |  | 1,345 |
State taxes | 11,161 |  |  | 12,212 |
Unremitted foreign earnings | 2,619 |  |  | 3,583 |
Convertible notes debt discount | 9,096 |  |  | — |
Lease right-of-use assets | 5,338 |  |  | — |
| 130,530 |  |  | 117,248 |
Net liability | $ | (68,829 | ) |  | $ | (75,899 | )
Schedule of Income before Income Tax | Income before income taxes consists of the following U.S. and foreign income:
| 2019 |  | 2018 |  | 2017
U.S. income | $ | 5,332 |  |  | $ | 24,320 |  |  | $ | 1,492 |
Foreign income | 25,893 |  |  | 26,333 |  |  | 27,240 |
Total income | $ | 31,225 |  |  | $ | 50,653 |  |  | $ | 28,732 |
Schedule of Unrecognized Tax Benefits Rollforward | The following table summarizes the activity related to our unrecognized tax benefits for the years ending December 31,:
| 2019 |  | 2018 |  | 2017
Balance as of January 1, | $ | 3,073 |  |  | $ | 2,943 |  |  | $ | 1,839 |
Increases (decreases) for positions taken in prior periods | — |  |  | (250 | ) |  | (246 | )
Increases for positions taken in current periods | 1,650 |  |  | 1,017 |  |  | 1,957 |
Decreases in unrecorded tax positions related to settlement with the taxing authorities | (2,404 | ) |  | (370 | ) |  | (607 | )
Decreases in unrecorded tax positions related to lapse of statute of limitations | (149 | ) |  | (267 | ) |  | — |
Balance as of December 31, | $ | 2,170 |  |  | $ | 3,073 |  |  | $ | 2,943 |

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