Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Components of property, plant and equipment
Land	$ 31,008	$ 30,912	$ 31,838
Land improvements and leasehold improvements	84,019	82,438	81,470
Buildings and storage facilities	370,877	365,744	349,773
Machinery and equipment	977,948	951,544	891,368
Construction in progress	48,771	36,541	56,578
Property, plant and equipment, gross	1,512,623	1,467,179	1,411,027
Less: accumulated depreciation	818,487	773,814	747,586
Property, plant and equipment, net	$ 694,136	$ 693,365	$ 663,441

Land improvements and leasehold improvements, gross.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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