QUARTERLY DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
QUARTERLY DATA (UNAUDITED)
Net Sales	$ 544,540	$ 601,196	$ 614,929	$ 576,518	$ 530,790	$ 517,537	$ 522,923	$ 505,469	$ 2,337,183	$ 2,076,719	$ 1,841,616
Gross profit	143,224	161,109	171,568	160,948	137,713	143,402	146,186	141,235	636,849	568,536
Net income	38,632	49,243	51,287	44,468	40,714	47,021	46,759	39,095	183,630	173,589	124,597
Net Income Attributable to AptarGroup, Inc.	$ 38,620	$ 49,297	$ 51,289	$ 44,477	$ 40,781	$ 46,983	$ 46,695	$ 39,022	$ 183,683	$ 173,481	$ 124,623
Net Income Attributable to AptarGroup, Inc. Per Common Share:
Basic (in dollars per share)	$ 0.59	$ 0.74	$ 0.77	$ 0.66	$ 0.61	$ 0.7	$ 0.69	$ 0.58	$ 2.76	$ 2.58	$ 1.84
Diluted (in dollars per share)	$ 0.57	$ 0.72	$ 0.74	$ 0.64	$ 0.59	$ 0.68	$ 0.67	$ 0.56	$ 2.65	$ 2.48	$ 1.79
Dividends declared (in dollars per share)	$ 0.22	$ 0.22	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.15	$ 0.15	$ 0.80	$ 0.66
Stock price low (in dollars per share)	$ 41.98	$ 44.66	$ 48.85	$ 46.50	$ 44.40	$ 36.91	$ 37.34	$ 34.46	$ 41.98	$ 34.46
Stock price high (in dollars per share)	$ 52.87	$ 54.66	$ 53.80	$ 50.19	$ 48.45	$ 46.55	$ 44.36	$ 40.85	$ 54.66	$ 48.45
Average Number of Shares Outstanding:
Basic (in shares)	65,976	66,381	66,939	66,926	66,965	67,213	67,630	67,576	66,553	67,344	67,643
Diluted (in shares)	68,159	68,677	69,438	69,914	69,397	69,374	69,682	70,077	69,274	69,815	69,785