SEGMENT INFORMATION - Schedule of Reportable Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Financial information regarding the Company's reportable segments
Net Sales	$ 910,063	$ 895,906	$ 1,825,511	$ 1,755,973
Acquisition-related costs	(140)	0	(140)	(255)
Restructuring Initiatives	(2,315)	(1,943)	(5,795)	(13,467)
Net unrealized investment (loss) gain	(140)	2,891	452	3,079
Depreciation and amortization	(64,968)	(62,267)	(129,317)	(121,526)
Interest Expense	(10,061)	(9,688)	(20,236)	(19,916)
Interest Income	3,102	648	6,000	1,320
Income before Income Taxes	118,246	110,878	222,564	184,147
Optimization initiative
Financial information regarding the Company's reportable segments
Restructuring Initiatives	(2,315)	(1,943)	(5,812)	(13,483)
Prior year initiatives
Financial information regarding the Company's reportable segments
Restructuring Initiatives	0	0	17	16
Aptar Pharma
Financial information regarding the Company's reportable segments
Net Sales	414,533	390,700	821,826	746,746
Aptar Beauty
Financial information regarding the Company's reportable segments
Net Sales	321,487	329,587	648,807	655,976
Aptar Closures
Financial information regarding the Company's reportable segments
Net Sales	174,043	175,619	354,878	353,251
Operating segment
Financial information regarding the Company's reportable segments
Net Sales	920,464	906,885	1,845,531	1,776,773
Operating segment | Aptar Pharma
Financial information regarding the Company's reportable segments
Net Sales	414,783	391,010	822,273	747,121
Adjusted EBITDA	141,488	125,866	273,666	235,164
Restructuring Initiatives	(65)	(434)	(89)	(1,565)
Operating segment | Aptar Beauty
Financial information regarding the Company's reportable segments
Net Sales	328,700	338,404	663,580	671,742
Adjusted EBITDA	44,638	43,100	85,772	80,305
Restructuring Initiatives	(1,199)	(479)	(3,909)	(9,770)
Operating segment | Aptar Closures
Financial information regarding the Company's reportable segments
Net Sales	176,981	177,471	359,678	357,910
Adjusted EBITDA	27,118	27,772	54,279	53,780
Restructuring Initiatives	(893)	(440)	(1,653)	(962)
Intersegment
Financial information regarding the Company's reportable segments
Net Sales	10,401	10,979	20,020	20,800
Intersegment | Aptar Pharma
Financial information regarding the Company's reportable segments
Net Sales	250	310	447	375
Intersegment | Aptar Beauty
Financial information regarding the Company's reportable segments
Net Sales	7,213	8,817	14,773	15,766
Intersegment | Aptar Closures
Financial information regarding the Company's reportable segments
Net Sales	2,938	1,852	4,800	4,659
Corporate & Other, unallocated
Financial information regarding the Company's reportable segments
Adjusted EBITDA	(20,476)	(15,501)	(42,117)	(34,337)
Restructuring Initiatives	$ (158)	$ (590)	$ (144)	$ (1,170)