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Property, Plant and Equipment, net
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net Property, Plant and Equipment, net
 
Property, plant and equipment consisted of the following:
 December 31,
 (in thousands)
20242023
Land$61,054 $62,587 
Buildings and site improvements246,138 246,021 
Leasehold improvements11,313 7,782 
Machinery and equipment567,322 516,017 
 885,827 832,407 
Less accumulated depreciation and amortization(516,320)(474,974)
 369,507 357,433 
Capital projects in progress162,148 61,179 
 $531,655 $418,612 
 
Property, plant and equipment as of December 31, 2024, and 2023, includes fully depreciated assets with an original cost of $402.1 million and $352.5 million, respectively, which are still in use. The Company capitalizes certain development costs associated with internal use software, including the direct costs of services provided by third-party consultants and payroll for internal employees, both of which are performing development and implementation activities on a software project. As of December 31, 2024, and 2023, the Company had capitalized software development costs net of accumulated amortization of $35.9 million and $33.8 million, respectively, included in machinery and equipment and as of December 31, 2024, and 2023, and $16.1 million and $9.7 million, respectively, was included in capital projects in progress.
Depreciation expense, including depreciation of equipment and amortization of internally developed and acquired software, was $59.7 million, $51.2 million, and $43.4 million for the years ended December 31, 2024, 2023 and 2022, respectively.