Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Components of inventory

Inventories are as follows (in thousands):

	December 31,
	2015		2014
Raw materials	$	44,997	$	50,195
Work-in-process	3,069		3,129
Finished goods	37,426		32,634
Inventories, net	$	85,492	$	85,958

Schedule of changes in the reserve for excess and obsolete inventory

Changes in the reserve for excess and obsolete inventory are as follows (in thousands):

	Year ended December 31,
	2015		2014			2013
Balance, beginning of year	$	—	$	2,744		$	2,752
Charged to costs and expenses	—		358			1,330
Deductions	—		(3,102		)	(1,338		)
Balance, end of the year	$	—	$	—		$	2,744