SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended			36 Months Ended
	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2015 USD ($) $ / shares	Dec. 31, 2017 USD ($) segment item $ / shares shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) $ / shares	Sep. 30, 2015 $ / shares
Number of reportable segments | segment				3
Total Restructuring Initiatives				$ 2,208
INVESTMENTS IN AFFILIATED COMPANIES
Dividends received from affiliates							$ 0
Gain on sale of investment in unconsolidated affiliate		$ 2,000			$ 2,013
Percentage of interest acquired	20.00%
Investment in unconsolidated affiliate	$ 5,000			$ 5,000
GOODWILL
Number of reportable units | item				4
Impairment of goodwill				$ 0
RETIREMENT OF COMMON STOCK
Common stock repurchased (retired and held in treasury) (in shares) | shares				1,900
Common stock repurchased and retired (in shares) | shares				512	1,700
Common stock, par value (in dollars per share) | $ / shares				$ 0.01			$ 0.01	$ 0.01
RESEARCH & DEVELOPMENT EXPENSES
Research and development expenses incurred net of customer funded research and development or government research and development credits				$ 68,200	$ 66,200	$ 67,100
INCOME TAXES
Recognized charge representing provisional estimate of one-time transition tax				31,600
TRANSLATION OF FOREIGN CURRENCIES
Foreign Currency Transaction Gain (Loss), before Tax				(5,000)	(326)	(3,900)
ADOPTION OF RECENT ACCOUNTING PRONOUNCEMENTS
Provision for Income Taxes				74,796	$ 74,893	$ 95,276
Accounting Standards Update 2016-09
ADOPTION OF RECENT ACCOUNTING PRONOUNCEMENTS
Provision for Income Taxes				$ (10,400)
Accounting principle change
CHANGE IN ACCOUNTING PRINCIPLE
Cumulative pre-tax effect			$ 7,400
Effect of change on net income attributable to AptarGroup			$ 4,800
Effect of change on net income attributable to AptarGroup per diluted share | $ / shares			$ 0.08
Buildings and improvements | Minimum
PROPERTY AND DEPRECIATION
Estimated useful lives				10 years
Buildings and improvements | Maximum
PROPERTY AND DEPRECIATION
Estimated useful lives				40 years
Machinery and equipment | Minimum
PROPERTY AND DEPRECIATION
Estimated useful lives				3 years
Machinery and equipment | Maximum
PROPERTY AND DEPRECIATION
Estimated useful lives				15 years
Business Transformation Plan
Total Restructuring Initiatives				$ 2,208
Patents, non-compete agreements and license agreements | Minimum
FINITE-LIVED INTANGIBLE ASSETS
Finite-Lived Intangible Asset, Useful Life				3 years
Patents, non-compete agreements and license agreements | Maximum
FINITE-LIVED INTANGIBLE ASSETS
Finite-Lived Intangible Asset, Useful Life				20 years
Beauty + Home
Total Restructuring Initiatives				$ 529
Food + Beverage
Total Restructuring Initiatives				$ 1,679