Property, Plant, and Equipment, Net

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, plant, and equipment, net were as follows:



	December 31,
(In thousands)	2016			2015
Buildings	$	48,367		$	50,044
Machinery and equipment	67,726			60,078
Tooling	31,773			26,231
Leasehold and building improvements	22,680			19,926
Software	11,581			11,067
Furniture and fixtures	3,794			4,005
Computer equipment	5,120			4,557
	191,041			175,908
Accumulated depreciation	(101,768		)	(96,365		)
	89,273			79,543
Construction in progress	16,078			10,472
Total property, plant, and equipment, net	$	105,351		$	90,015

Depreciation expense, including tooling depreciation which is recorded in cost of goods sold, was $20.7 million, $15.6 million and $14.1 million for the years ended December 31, 2016, 2015, and 2014, respectively.

The net book value of property, plant, and equipment located within the PRC was $90.0 million and $79.4 million on December 31, 2016 and 2015, respectively.

Construction in progress was as follows:



	December 31,
(In thousands)	2016		2015
Buildings	$	118	$	105
Machinery and equipment	4,625		6,620
Tooling	2,219		1,265
Leasehold and building improvements	1,335		244
Software	7,674		1,888
Other	107		350
Total construction in progress	$	16,078	$	10,472

We expect that most of the assets under construction will be placed into service during the first six months of 2017. We will begin to depreciate the cost of these assets under construction once they are placed into service.