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Acquisitions and Divestitures (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 23, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 1,697,332 |  | $ 1,697,332 |  | $ 1,697,955
Finger Lakes Instrumentation (FLI) |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Consideration transferred | $ 23,600 |  |  |  |  |
Aggregate purchase price, cash paid | 20,200 |  |  |  |  |
Contingent consideration | $ 3,400 |  |  |  |  |
Contingent consideration arrangements, period | 24 months |  |  |  |  |
Goodwill | $ 12,600 |  |  |  |  |
Intangible assets | $ 7,900 |  |  |  |  |
Selling, general and administrative expenses |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquisition-related transaction costs |  | $ 400 | $ 800 | $ 700 | $ 1,500 |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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