Property, Plant and Equipment, Net (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2025	Mar. 31, 2026	Sep. 30, 2025	Mar. 31, 2025	Dec. 31, 2025
Property, Plant and Equipment
Less: accumulated depreciation and amortization		$ (589,955)		$ (531,393)	$ (577,223)
Property, plant and equipment excluding capital projects in progress, net		560,814		372,029	539,638
Capital projects in progress		60,323		196,474	88,216
Property, plant and equipment, net		621,137		568,503	627,854
Property, Plant And Equipment, Gross, Excluding Capital Projects In Progress		$ 1,150,769		$ 903,422	1,116,861
Diluted		$ 2.13		$ 1.85
Asset, Held-for-Sale, Not Part of Disposal Group		$ 2,400
Gain (Loss) on Disposition of Property Plant Equipment	$ 12,900	(53)		$ 76
Sale Leaseback Transaction, Lease Terms			five months
Proceeds from Sale of Buildings	$ 19,000
Land
Property, Plant and Equipment
Property, plant and equipment, gross		60,974		59,512	61,552
Buildings and site improvements
Property, Plant and Equipment
Property, plant and equipment, gross		364,108		249,000	363,959
Leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross		16,700		13,487	12,465
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross		$ 708,987		$ 581,423	$ 678,885