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Acquisitions - Other Acquisitions (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 15, 2020 | Feb. 27, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 0 |  |  | $ 84,270 |  |  |  |
Goodwill | 300,610 | $ 303,970 |  |  | $ 303,970 |  |  |
Net sales | $ 206,730 |  |  | 182,790 |  |  |  |
Affaba & Ferrari Srl [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | $ 98,400 |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 49,100 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  | 35,100 |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Net Working Capital |  |  |  |  |  |  | 9,400 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  | 17,400 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  |  |  |  | $ 12,600 |
Net sales |  |  |  |  | $ 34,000 |  |  |
Rapak [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  | $ 11,400 |  |  |  |  |
Net sales |  |  |  |  |  | $ 30,000 |  |
RSA Engineered Products [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  | $ 83,700 |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 43,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  | 36,900
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Net Working Capital |  |  |  |  |  |  |  | 10,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  |  | 2,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  |  |  |  |  | $ 8,700
Net sales |  |  |  |  |  | $ 30,000 |  |

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