ACQUISITIONS (Details 3) (Stelmi Group, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stelmi Group
Unaudited pro forma financial information
Net Sales	$ 617,633	$ 625,474
Net Income Attributable to AptarGroup, Inc.	$ 40,037	$ 46,530
Net Income per common share - basic	$ 0.61	$ 0.70
Net Income per common share - diluted	$ 0.59	$ 0.68