Property, Plant and Equipment, net

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

10. Property, Plant and Equipment, net

Property, plant and equipment consists of:

	Estimated Useful	December 31,
	Lives	2023			2022
		(In thousands)
Land improvements	10 - 25 years	$	7,910		$	7,240
Buildings	15 - 40 years		174,085			169,315
Machinery, equipment and other	3 - 10 years		440,008			385,745
			622,003			562,300
Less: Accumulated depreciation			(439,776	)		(410,850	)
			182,227			151,450
Land			10,357			9,858
Construction work in process			25,047			19,962
Total property, plant and equipment		$	217,631		$	181,270

Depreciation expense totaled $26.7 million, $26.6 million and $27.2 million for 2023, 2022 and 2021, respectively.