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Acquisitions (Allocation of Purchase Consideration to the Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Feb. 13, 2020 | Jan. 15, 2020 | Dec. 31, 2019 | Aug. 30, 2019
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 382,045 |  |  | $ 329,705 |
Delta Separations |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Working capital |  | $ 3,183 |  |  |
Property, plant and equipment |  | 337 |  |  |
Acquired intangible assets |  | 7,600 |  |  |
Other assets |  | 923 |  |  |
Other liabilities |  | (4,189) |  |  |
Goodwill |  | 39,335 |  |  |
Fair value of purchase consideration |  | $ 47,189 |  |  |
Thermo Energy Systems |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash |  |  | $ 58 |  |
Working capital |  |  | (16,464) |  |
Property, plant and equipment |  |  | 1,029 |  |
Acquired intangible assets |  |  | 9,386 |  |
Other assets |  |  | 1,285 |  |
Other liabilities |  |  | (1,285) |  |
Goodwill |  |  | 13,324 |  |
Fair value of purchase consideration |  |  | $ 7,333 |  |
Apeks |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash |  |  |  |  | $ 4,154
Working capital |  |  |  |  | (1,412)
Property, plant and equipment |  |  |  |  | 1,059
Acquired intangible assets |  |  |  |  | 3,400
Other assets |  |  |  |  | 508
Other liabilities |  |  |  |  | (1,081)
Goodwill |  |  |  |  | 5,933
Fair value of purchase consideration |  |  |  |  | $ 12,561

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + 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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