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Acquisition Acquisition (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 11 Months Ended | 12 Months Ended | 33 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 19, 2018 | Jan. 11, 2017 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2019 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  | $ 223.8 | $ 236.2 | $ 188.4 | $ 178.5 | $ 215.5 | $ 196.0 | $ 164.4 | $ 168.3 |  | $ 826.9 | $ 744.2 | $ 755.7 |  |
Net earnings (loss) |  |  | 79.6 | $ (16.2) | $ 4.6 | $ (0.3) | 85.5 | $ 15.7 | $ (29.7) | $ (3.2) |  | 67.7 | 68.3 | $ (42.3) |  |
Goodwill |  |  | 887.9 |  |  |  | 884.9 |  |  |  | $ 887.9 | 887.9 | 884.9 |  |  | $ 871.6
Compex Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 16.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and short-term investments | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of total consideration | 18.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Other | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | 1.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 2.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 2.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Asset, Noncurrent | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 3.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (0.2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 18.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  | 12.6 |  |  |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  | 3.4 |  |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
17Q1 Capacitor Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 3.7 |  |  |  |  |  |  |  |  |  | $ 1.0 | 2.5 |  |  |
Scenario, Forecast [Member] | 17Q1 Capacitor Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.2 |
Customer relationships (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships (1) | Compex Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 7.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unpatented technologies (1) (2) | Compex Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 2.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks [Member] | Compex Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Precision Devices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Translation and Purchase Accounting Adjustments |  |  |  |  |  |  |  |  |  |  |  | $ 0.1 |  |  |  |
Goodwill |  |  | $ 28.0 |  |  |  | $ 25.0 |  |  |  | $ 28.0 | $ 28.0 | $ 25.0 |  |  | $ 25.0
Other liabilities | Compex Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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=84161108&loc=d3e4845-128472 + Details
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