Inventories (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

The following table summarizes inventories by major classification: 

	June 30, 2017		December 31, 2016
	(in thousands)
Finished goods	$	151,639	$	142,333
Raw materials	3,290		4,042
Work-in-progress	820		654
Total inventories	$	155,749	$	147,029