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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Provision for Income Taxes | The provision (benefit) for income taxes for the years ended December 31, 2018, 2017 and 2016 consists of the following:
| 2018 |  | 2017 |  | 2016
Current tax expense: |  |  |  |  |
Federal | $ | (1,077 | ) |  | $ | 1,744 |  |  | $ | 312 |
State | 777 |  |  | 2,101 |  |  | 159 |
Foreign | 8,036 |  |  | 9,421 |  |  | 7,111 |
| 7,736 |  |  | 13,266 |  |  | 7,582 |
Deferred income tax expense (benefit) | 2,063 |  |  | (40,021 | ) |  | (2,871 | )
Provision (benefit) for income taxes | $ | 9,799 |  |  | $ | (26,755 | ) |  | $ | 4,711 |
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, 2018, 2017 and 2016 follows:
| 2018 |  | 2017 |  | 2016
Tax provision at statutory rate based on income before income taxes | 21.0 | % |  | 35.0 | % |  | 35.0 | %
US tax reform | 1.8 |  |  | (111.0 | ) |  | — |
International tax reform | (3.6 | ) |  | — |  |  | — |
Consolidated group restructuring | — |  |  | (7.4 | ) |  | — |
Foreign income taxes | 3.6 |  |  | (5.3 | ) |  | (6.8 | )
Federal research credit | (2.8 | ) |  | (2.8 | ) |  | (5.6 | )
Settlement of taxing authority examinations | (0.7 | ) |  | (2.1 | ) |  | (3.5 | )
Stock-based compensation | (1.6 | ) |  | (2.1 | ) |  | — |
European permanent deduction | (0.2 | ) |  | (0.5 | ) |  | (3.4 | )
Non deductible/non-taxable items | (1.2 | ) |  | (0.5 | ) |  | 7.2 |
State income taxes, net of federal tax benefit | 1.6 |  |  | 2.8 |  |  | 1.7 |
US tax on worldwide earnings at different rates | 2.9 |  |  | — |  |  | — |
Other, net | (1.5 | ) |  | 0.8 |  |  | (0.3 | )
| 19.3 | % |  | (93.1 | )% |  | 24.3 | %
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, 2018 and 2017 are as follows:
| 2018 |  | 2017
Assets: |  |  |
Inventory | $ | 4,096 |  |  | $ | 2,420 |
Net operating losses | 7,358 |  |  | 11,091 |
Capitalized research and development | 7,214 |  |  | 8,557 |
Deferred compensation | 2,085 |  |  | 1,749 |
Accounts receivable | 2,296 |  |  | 1,855 |
Compensation and benefits | 5,434 |  |  | 4,138 |
Accrued pension | 3,205 |  |  | 2,695 |
Research and development credit | 8,585 |  |  | 8,957 |
Other | 2,235 |  |  | 9,342 |
Less: valuation allowances | (1,159 | ) |  | (570 | )
| 41,349 |  |  | 50,234 |
Liabilities: |  |  |  |
Goodwill and intangible assets | 100,108 |  |  | 102,099 |
Depreciation | 1,345 |  |  | 3,333 |
State taxes | 12,212 |  |  | 11,709 |
Unremitted foreign earnings | 3,583 |  |  | 6,000 |
Contingent interest | — |  |  | 40 |
| 117,248 |  |  | 123,181 |
Net liability | $ | (75,899 | ) |  | $ | (72,947 | )
Schedule of Income before Income Tax | Income before income taxes consists of the following U.S. and foreign income:
| 2018 |  | 2017 |  | 2016
U.S. income (loss) | $ | 24,320 |  |  | $ | 1,492 |  |  | $ | (6,128 | )
Foreign income | 26,333 |  |  | 27,240 |  |  | 25,503 |
Total income | $ | 50,653 |  |  | $ | 28,732 |  |  | $ | 19,375 |
Schedule of Unrecognized Tax Benefits Rollforward | The following table summarizes the activity related to our unrecognized tax benefits for the years ending December 31,:
| 2018 |  | 2017 |  | 2016
Balance as of January 1, | $ | 2,943 |  |  | $ | 1,839 |  |  | $ | 616 |
Increases (decreases) for positions taken in prior periods | (250 | ) |  | (246 | ) |  | — |
Increases for positions taken in current periods | 1,017 |  |  | 1,957 |  |  | 1,584 |
Decreases in unrecorded tax positions related to settlement with the taxing authorities | (370 | ) |  | (607 | ) |  | (361 | )
Decreases in unrecorded tax positions related to lapse of statute of limitations | (267 | ) |  | — |  |  | — |
Balance as of December 31, | $ | 3,073 |  |  | $ | 2,943 |  |  | $ | 1,839 |

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