Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Depreciation is generally provided over the following estimated useful service lives:

Land improvements	10 - 20 years
Buildings	15 - 45 years
Machinery and equipment	3 - 20 years

Depreciation expense was recorded as follows:

(amounts in thousands)	2019		2018		2017
Cost of sales	$	84,449	$	85,357	$	78,975
Selling, general and administrative	9,882		8,699		7,835
Total depreciation expense	$	94,331	$	94,056	$	86,810

(amounts in thousands)	2019			2018
Land improvements	$	34,211		$	34,060
Buildings	502,315			501,659
Machinery and equipment	1,369,174			1,306,555
Total depreciable assets	1,905,700			1,842,274
Accumulated depreciation	(1,188,209		)	(1,138,898		)
	717,491			703,376
Land	69,262			69,188
Construction in progress	77,622			70,839
Total property and equipment, net	$	864,375		$	843,403