CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net Sales	$ 2,929,340	$ 2,859,732	$ 2,764,761
Operating Expenses:
Cost of sales (exclusive of depreciation and amortization shown below)	1,842,821	1,818,398	1,812,961
Selling, research & development and administrative	500,229	454,617	429,955
Depreciation and amortization	220,300	194,552	171,747
Restructuring initiatives	26,492	20,472	63,829
Total Operating Expenses	2,589,842	2,488,039	2,478,492
Operating Income	339,498	371,693	286,269
Other (Expense) Income:
Interest expense	(33,244)	(35,489)	(32,626)
Interest income	958	4,174	7,056
Equity in results of affiliates	(1,443)	135	(229)
Miscellaneous, net	(4,614)	1,556	5,550
Total Other (Expense) Income	(38,343)	(29,624)	(20,249)
Income before Income Taxes	301,155	342,069	266,020
Provision for Income Taxes	87,065	99,842	71,254
Net Income	214,090	242,227	194,766
Net Income Attributable to Noncontrolling Interests	(50)	(25)	(21)
Net Income Attributable to AptarGroup, Inc.	$ 214,040	$ 242,202	$ 194,745
Net Income Attributable to AptarGroup, Inc. per Common Share:
Basic (in dollars per share)	$ 3.32	$ 3.81	$ 3.12
Diluted (in dollars per share)	$ 3.21	$ 3.66	$ 3.00