Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of inventory

Net inventories consist of the following:

(in thousands)	March 31, 2018			December 31, 2017
Finished goods		$	143,147		$	133,161
Work in process		11,024			10,243
Raw materials		14,040			12,164
Total inventory		$	168,211		$	155,568