Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property and equipment

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

	Estimated Useful Life	December 31,
		2016			2015
Land	—	$	22,326		$	22,972
Buildings	30 years	162,701			163,420
Machinery and equipment	3 to 7 years	258,023			241,310
Office equipment and other	3 to 10 years	103,798			98,308
		546,848			526,010
Less accumulated depreciation		(275,063		)	(253,381		)
		$	271,785		$	272,629

Depreciation expense for the years ended December 31, 2016, 2015 and 2014 was $37.8 million, $32.5 million and $34.6 million, respectively.