Property, Plant and Equipment, net

12 Months Ended

Dec. 31, 2020

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	2020			2019
		(In thousands)
Land improvements	10-25 years	$	7,379		$	7,790
Buildings	15-40 years		206,732			213,705
Machinery, equipment and other	3-10 years		390,803			382,837
			604,914			604,332
Less accumulated depreciation			(399,095	)		(371,365	)
			205,819			232,967
Land			12,408			12,550
Construction work in process			16,596			12,980
Total property, plant and equipment		$	234,823		$	258,497

Depreciation expense totaled $28.7 million, $31.0 million and $32.8 million for 2020, 2019 and 2018, respectively.