Property and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

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

	Estimated Useful Life	December 31,
		2018			2017
Land	—	$	21,595		$	22,765
Buildings	30 years	171,406			167,645
Machinery and equipment	3 to 7 years	287,596			275,688
Office equipment and other	3 to 10 years	100,210			104,064
		580,807			570,162
Less accumulated depreciation		(333,400		)	(306,166		)
		$	247,407		$	263,996

Depreciation expense for the years ended December 31, 2018, 2017 and 2016 was $40.6 million, $42.3 million and $37.8 million, respectively.