Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property and equipment

Property and equipment are summarized as follows (in thousands):

	Estimated Useful Life	December 31,
		2020		2019
Land	—	$	24,270	$	21,511
Buildings	30 years	186,064		167,852
Machinery and equipment	3 to 7 years	326,984		307,530
Office equipment and other	3 to 10 years	130,851		129,127
		668,169		626,020
Less accumulated depreciation		(400,487)		(370,115)
		$	267,682	$	255,905

Note 8.    Property and Equipment - (Continued)

Depreciation expense for the years ended December 31, 2020, 2019 and 2018 was $45.1 million, $44.2 million and $40.6 million, respectively.