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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Income Tax Contingency [Line Items] |  |  |  |  |
Annual effective tax rate ( as a percent ) |  |  | 24.80% | 16.50% |
Provision for (benefit from) income taxes | $ 1,158 | $ (150) | $ 9,225 | $ (4,966) |
Unrecognized tax benefits | 14,200 |  | 14,200 |  | $ 10,000
Accrued interest and penalties | $ 1,600 |  | 1,600 |  | $ 1,400
Equity Compensation |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Provision for (benefit from) income taxes |  |  | (7,000) | (2,600) |
Aesynt |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Provision for (benefit from) income taxes |  |  | $ 9,600 | $ (4,200) |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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