Property, Plant, and Equipment, Net

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

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



	December 31,
(In thousands)	2015			2014
Buildings	$	50,044		$	51,046
Machinery and equipment	60,078			52,449
Tooling	26,231			22,558
Leasehold and building improvements	19,926			18,344
Software	11,067			10,957
Furniture and fixtures	4,005			3,899
Computer equipment	4,557			4,421
	175,908			163,674
Accumulated depreciation	(96,365		)	(90,048		)
	79,543			73,626
Construction in progress	10,472			2,509
Total property, plant, and equipment, net	$	90,015		$	76,135

Depreciation expense, including tooling depreciation which is recorded in cost of goods sold, was $15.6 million, $14.1 million and $14.2 million for the years ended December 31, 2015, 2014, and 2013, respectively.

The net book value of property, plant, and equipment located within the PRC was $79.4 million and $66.0 million on December 31, 2015 and 2014, respectively.

Construction in progress was as follows:



	December 31,
(In thousands)	2015		2014
Buildings	$	105	$	146
Machinery and equipment	6,620		1,045
Tooling	1,265		284
Leasehold and building improvements	244		370
Software	1,888		335
Other	350		329
Total construction in progress	$	10,472	$	2,509

We expect that most of the assets under construction will be placed into service during the first six months of 2016. We will begin to depreciate the cost of these assets under construction once they are placed into service.