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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Tax Credit Carryforward [Line Items] |  |  |
Net tax expense on sale of intellectual property rights | $ 7,400 |  |
Tax benefit associated with making a check-the-box election to treat Aesynt as a U.S. disregarded entity |  | $ 4,200 |
Valuation allowance | 1,186 | 1,256 |
Unrecognized tax benefits that would impact tax expense | 16,800 |  |
Uncertain tax positions, interest and penalties | 500 | 500 | $ 300
Interest and penalties accrued | 1,000 | $ 1,400 | $ 1,400
Internal Revenue Service (IRS) |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Net operating loss | 3,200 |  |
State and Local Jurisdiction |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Net operating loss | 7,400 |  |
Foreign Tax Authority |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Net operating loss | 29,500 |  |
Research Tax Credit Carryforward | Internal Revenue Service (IRS) |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforward amount | 3,100 |  |
Research Tax Credit Carryforward | State and Local Jurisdiction |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforward amount | $ 15,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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