SEGMENT INFORMATION - Schedule of Income Before Income Taxes Regarding the Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financial information regarding the Company's reportable segments
Net Sales	$ 1,026,508	$ 966,009	$ 2,009,376	$ 1,853,314
Cost of Sales (exclusive of depreciation and amortization):	660,991	598,994	1,291,950	1,149,885
Selling, Research & Development and Administrative:	157,735	151,139	325,337	306,416
Acquisition-related costs	(38)	(344)	(228)	(344)
Restructuring Initiatives	(1,419)	(1,579)	(2,505)	(3,621)
Net unrealized investment gain (loss)	849	2,102	(237)	1,006
Other special items	(4,077)	0	(7,804)	0
Depreciation and amortization	(79,641)	(69,904)	(155,366)	(135,551)
Interest Expense	(16,001)	(10,850)	(32,943)	(22,201)
Interest Income	2,787	1,880	6,429	4,694
Income before Income Taxes	115,047	139,714	208,818	245,729
Pharma
Financial information regarding the Company's reportable segments
Net Sales	458,167	442,589	896,727	852,056
Beauty
Financial information regarding the Company's reportable segments
Net Sales	367,454	334,849	731,089	640,556
Closures
Financial information regarding the Company's reportable segments
Net Sales	200,887	188,571	381,560	360,702
Operating Segment
Financial information regarding the Company's reportable segments
Net Sales	1,038,307	975,346	2,031,565	1,871,265
Adjusted EBITDA	228,496	235,787	438,858	442,635
Depreciation and amortization	(78,537)	(69,091)	(153,127)	(133,876)
Operating Segment \| Pharma
Financial information regarding the Company's reportable segments
Net Sales	458,321	442,817	897,229	852,514
Cost of Sales (exclusive of depreciation and amortization):	243,537	224,879	472,073	430,016
Selling, Research & Development and Administrative:	65,145	60,703	133,261	123,186
Other Segment Items:	(4,420)	176	(8,735)	(427)
Adjusted EBITDA	153,905	156,831	300,128	299,281
Restructuring Initiatives	66	(68)	61	(258)
Depreciation and amortization	(39,260)	(34,169)	(74,903)	(65,317)
Operating Segment \| Beauty
Financial information regarding the Company's reportable segments
Net Sales	377,426	342,251	749,584	654,552
Cost of Sales (exclusive of depreciation and amortization):	270,862	241,378	542,350	465,426
Selling, Research & Development and Administrative:	52,846	48,738	105,476	95,150
Other Segment Items:	(996)	(2,340)	(1,961)	(4,231)
Adjusted EBITDA	44,742	47,073	85,224	84,211
Restructuring Initiatives	(1,417)	(626)	(2,718)	(1,021)
Depreciation and amortization	(24,750)	(21,475)	(49,473)	(41,537)
Operating Segment \| Closures
Financial information regarding the Company's reportable segments
Net Sales	202,560	190,278	384,752	364,199
Cost of Sales (exclusive of depreciation and amortization):	146,864	133,362	278,747	255,753
Selling, Research & Development and Administrative:	24,707	23,858	49,652	46,870
Other Segment Items:	(533)	(532)	(345)	(1,064)
Adjusted EBITDA	29,849	31,883	53,506	59,143
Restructuring Initiatives	(87)	(890)	(336)	(2,242)
Depreciation and amortization	(14,527)	(13,447)	(28,751)	(27,022)
Intersegment
Financial information regarding the Company's reportable segments
Net Sales	(11,799)	(9,337)	(22,189)	(17,951)
Intersegment \| Pharma
Financial information regarding the Company's reportable segments
Net Sales	(154)	(228)	(502)	(458)
Intersegment \| Beauty
Financial information regarding the Company's reportable segments
Net Sales	(9,972)	(7,402)	(18,495)	(13,996)
Intersegment \| Closures
Financial information regarding the Company's reportable segments
Net Sales	(1,673)	(1,707)	(3,192)	(3,497)
Corporate & Other
Financial information regarding the Company's reportable segments
Adjusted EBITDA	(15,909)	(17,378)	(37,386)	(40,889)
Restructuring Initiatives	19	5	488	(100)
Depreciation and amortization	$ (1,104)	$ (813)	$ (2,239)	$ (1,675)

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