Property, Plant and Equipment, net

12 Months Ended

Dec. 31, 2019

Property Plant And Equipment [Abstract]

Property, Plant and Equipment, net

6. Property, Plant and Equipment, net

Property, plant and equipment consists of:

	Estimated Useful	December 31,
	Lives	2019			2018
		(In thousands)
Land improvements	10-25 years	$	7,790		$	7,774
Buildings	15-40 years		213,705			212,501
Machinery, equipment and other	3-10 years		382,837			375,240
			604,332			595,515
Less accumulated depreciation			(371,365	)		(349,701	)
			232,967			245,814
Land			12,550			12,524
Construction work in process			12,980			15,785
Total property, plant and equipment		$	258,497		$	274,123

Depreciation expense totaled $31.0 million, $32.8 million and $38.6 million for 2019, 2018 and 2017, respectively.