Segment Information - Reportable Business Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net sales		$ 1,348,661	$ 1,176,470	$ 2,586,771	$ 2,206,854
Depreciation and amortization	[1]	60,104	51,965	119,655	102,095
Rationalization charges		354	1,942	10,711	4,741
Segment income		152,954	131,234	279,503	233,375
Amortization of debt issuance costs and discounts		1,400	1,100	2,700	2,100
Dispensing and Specialty Closures
Segment Reporting Information [Line Items]
Net sales		545,768	410,468	1,055,120	767,619
Depreciation and amortization	[1]	29,101	22,026	57,991	42,150
Rationalization charges		67	700	5,298	1,442
Segment income		73,836	58,581	139,481	103,810
Metal Containers
Segment Reporting Information [Line Items]
Net sales		624,534	597,191	1,178,615	1,105,709
Depreciation and amortization	[1]	21,329	20,545	42,578	41,026
Rationalization charges		225	1,153	5,246	3,116
Segment income		58,635	71,782	104,249	119,261
Custom Containers
Segment Reporting Information [Line Items]
Net sales		178,359	168,811	353,036	333,526
Depreciation and amortization	[1]	9,632	9,352	19,005	18,840
Rationalization charges		62	89	167	183
Segment income		27,244	22,987	51,730	45,032
Corporate
Segment Reporting Information [Line Items]
Net sales		0	0	0	0
Depreciation and amortization	[1]	42	42	81	79
Rationalization charges		0	0	0	0
Segment income		$ (6,761)	$ (22,116)	$ (15,957)	$ (34,728)

[1] Depreciation and amortization excludes amortization of debt discount and debt issuance costs of $1.4 million and $1.1 million for the three months ended June 30, 2021 and 2020, respectively and $2.7 million and $2.1 million for the six months ended June 30, 2021 and 2020, respectively.