Inventories, net (Tables)

12 Months Ended

Dec. 31, 2014

Inventories, net

Schedule of components of inventories

	December 31,
	2014		2013
	(in thousands)
Raw materials	$	65,723	$	56,942
Work in process		22,358		27,462
Finished goods		15,982		11,385
	$	104,063	$	95,789