Segment Information - Reportable Business Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales		$ 1,651,070	$ 1,488,499	$ 4,237,841	$ 3,695,353
Depreciation and amortization	[1]	62,171	58,031	181,826	160,127
Rationalization charges		2,315	2,505	13,026	7,247
Segment income		167,917	174,033	447,420	407,408
Amortization of debt issuance costs and discounts		1,400	1,200	4,100	3,300
Dispensing and Specialty Closures
Segment Reporting Information [Line Items]
Net sales		533,329	475,105	1,588,449	1,242,725
Depreciation and amortization	[1]	30,830	27,777	88,821	69,927
Rationalization charges		406	787	5,704	2,229
Segment income		60,090	64,161	199,571	167,971
Metal Containers
Segment Reporting Information [Line Items]
Net sales		942,125	856,660	2,120,740	1,962,370
Depreciation and amortization	[1]	21,231	21,008	63,809	62,034
Rationalization charges		1,822	1,639	7,068	4,755
Segment income		94,271	94,497	198,520	213,757
Custom Containers
Segment Reporting Information [Line Items]
Net sales		175,616	156,734	528,652	490,258
Depreciation and amortization	[1]	10,072	9,207	29,077	28,046
Rationalization charges		87	79	254	263
Segment income		22,704	21,887	74,434	66,918
Corporate
Segment Reporting Information [Line Items]
Net sales		0	0	0	0
Depreciation and amortization	[1]	38	39	119	120
Rationalization charges		0	0	0	0
Segment income		$ (9,148)	$ (6,512)	$ (25,105)	$ (41,238)

[1] Depreciation and amortization excludes amortization of debt discount and debt issuance costs of $1.4 million and $1.2 million for the three months ended September 30, 2021 and 2020, respectively and $4.1 million and $3.3 million for the nine months ended September 30, 2021 and 2020, respectively.