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Acquisitions - Other Acquisitions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Feb. 27, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  | $ 95,160 | $ 67,030 |  |  |
Net sales | $ 199,550 |  | $ 190,830 |  | 382,340 | 364,200 |  |  |
Non-cash purchase accounting related expenses |  |  | 200 |  |  | 1,200 |  |  |
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 |  |  |  |  |  |  |
Business Combinations, Assets Acquired and Liabilities Assumed, Goodwill and Intangible Assets |  |  |  |  |  |  |  |  | $ 80,200
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 |  |
Taplast S.p.A. [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  | 44,700 |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  | $ 32,000 |
Plastic Srl [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  | $ 22,400 |  |  |  |  |
Net sales |  |  |  |  |  |  |  | $ 12,000 |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Non-cash purchase accounting related expenses |  |  | 900 |  |  |  |  |  |
Cost of Sales [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Non-cash purchase accounting related expenses | $ 2,300 |  | $ 200 |  | $ 2,800 | $ 300 |  |  |

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