Acquisitions Acquisitions - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 15, 2020	Feb. 27, 2020
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 193,540	$ 67,090	$ 0
Net sales	769,970	723,530	705,030
Goodwill	303,970	334,640	316,650
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
Net sales		30,000
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
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Net Working Capital					10,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					36,900
Goodwill					$ 43,300
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
Affaba & Ferrari Srl [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	98,400
Net sales	$ 34,000
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
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Net Working Capital				9,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				35,100
Goodwill				$ 49,100