Property, Plant and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	December 31,
	2018			2017
Build-to-suit facility	$	52,067		$	51,721
Construction-in-progress	51,243			21,738
Land and buildings	46,650			46,729
Leasehold improvements	33,273			28,779
Manufacturing equipment and machinery	25,837			23,586
Computer software	19,062			19,969
Computer equipment	13,679			12,814
Furniture and fixtures	8,155			5,947
Subtotal	249,966			211,283
Less accumulated depreciation and amortization	(49,608		)	(41,203		)
Property, plant and equipment, net	$	200,358		$	170,080

Depreciation and amortization expense (including amortization expense related to a facility lease) on property, plant and equipment amounted to $15.2 million, $13.1 million and $11.8 million for the years ended December 31, 2018, 2017 and 2016, respectively.