CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net Sales	$ 825,442	$ 759,153	$ 2,413,228	$ 2,180,011
Operating Expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	537,085	479,672	1,548,840	1,372,630
Selling, research & development and administrative	135,931	121,850	411,192	371,407
Depreciation and amortization	59,280	55,179	174,508	162,414
Restructuring initiatives	10,223	3,415	18,771	15,585
​Total Operating Expenses	742,519	660,116	2,153,311	1,922,036
Operating Income	82,923	99,037	259,917	257,975
Other Income (Expense):
Interest expense	(8,011)	(8,851)	(22,601)	(25,973)
Interest income	401	249	1,406	599
Net investment (loss) gain	(9,021)	0	6,177	0
Equity in results of affiliates	(71)	(256)	(505)	(1,383)
Miscellaneous, net	13	(1,040)	(2,978)	(3,375)
​Total Other Expense	(16,689)	(9,898)	(18,501)	(30,132)
Income before Income Taxes	66,234	89,139	241,416	227,843
Provision for Income Taxes	19,340	25,404	55,309	66,998
Net Income	46,894	63,735	186,107	160,845
Net Loss (Income) Attributable to Noncontrolling Interests	366	(19)	381	(37)
Net Income Attributable to AptarGroup, Inc.	$ 47,260	$ 63,716	$ 186,488	$ 160,808
Net Income Attributable to AptarGroup, Inc. per Common Share:
Basic (in dollars per share)	$ 0.72	$ 0.99	$ 2.84	$ 2.50
Diluted (in dollars per share)	$ 0.70	$ 0.95	$ 2.75	$ 2.42
Average Number of Shares Outstanding:
Basic (in shares)	65,900	64,562	65,652	64,278
Diluted (in shares)	67,801	66,922	67,799	66,483
Dividends per Common Share (in dollars per share)	$ 0.38	$ 0.36	$ 1.12	$ 1.08