Property and Equipment

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Property and equipment, net, consists of the following (in thousands):



	September 30, 2017			December 31, 2016
Building and building improvements	$	86,023		$	85,966
Machinery and equipment	45,718			41,683
Aircraft and vehicles	25,329			45
Land	23,762			23,762
Leasehold improvements	15,015			8,289
Computer equipment	14,440			13,549
Tooling	13,667			12,895
Furniture and office equipment	10,821			9,669
Demonstration units	489			448
Construction-in-progress	8,434			7,923
Total property and equipment	243,698			204,229
Accumulated depreciation and amortization	(79,119		)	(68,233		)
Property and equipment, net	$	164,579		$	135,996

In August 2017, the Company completed its purchase of a corporate aircraft for $25.3 million. For the nine months ended September 30, 2017 and October 1, 2016, depreciation expense of property and equipment was $10.8 million and $9.5 million, respectively.