CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities:
Net income	$ 570,582	$ 633,125	$ 408,375
Adjustments to reconcile net income to net cash provided by operating activities:
Total depreciation and amortization expense	195,081	170,343	153,472
Amortization of intangible assets and deferred proceeds, net	23,449	23,448	23,494
Fair value adjustment of acquisition related contingent consideration	131,901	59,166	159,354
Deferred income taxes	13,704	2,529	(49,021)
Amortization of debt costs	3,346	2,310	991
Loss on sale of property, plant and equipment	644	3,168	7,181
Pension plan settlement expense	0	0	112,796
Change in current assets less current liabilities	10,551	(3,774)	29,138
Change in other noncurrent assets	7,054	8,904	12,708
Change in other noncurrent liabilities	(24,408)	(22,862)	(47,798)
Total adjustments	361,322	243,232	402,315
Net cash provided by operating activities	931,904	876,357	810,690
Cash Flows from Investing Activities:
Proceeds from the disposal of short-term investments	696,415	150,274	0
Purchases of short-term investments	(390,111)	(446,309)	0
Additions to property, plant and equipment	(312,315)	(371,015)	(282,304)
Investment in equity method investees	(19,600)	(15,720)	(13,741)
Proceeds from the sale of property, plant and equipment	6,594	569	695
Net cash used in investing activities	(19,017)	(682,201)	(295,350)
Cash Flows from Financing Activities:
Payments related to share repurchases	(2,606,031)	(625,654)	0
Proceeds from term loan facility upon modification	950,000	0	0
Repayment of bridge loan upon extinguishment	(800,000)	0	0
Repayment of senior bonds	(350,000)	0	0
Cash dividends paid	(86,673)	(185,635)	(46,868)
Payments of acquisition related contingent consideration	(68,884)	(64,312)	(28,208)
Debt issuance fees	(3,396)	(15,512)	(340)
Payments on financing lease obligations	(1,809)	(2,488)	(2,303)
Net cash (used in) provided by financing activities	(1,766,793)	306,399	(77,719)
Net (decrease) increase in cash and cash equivalents	(853,906)	500,555	437,621
Cash and cash equivalents at beginning of year	1,135,824	635,269	197,648
Cash and cash equivalents at end of year	281,918	1,135,824	635,269
Bridge loan
Cash Flows from Financing Activities:
Proceeds from bridge loan and bond issuance	1,200,000	0	0
Senior bonds
Cash Flows from Financing Activities:
Proceeds from bridge loan and bond issuance	$ 0	$ 1,200,000	$ 0