Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories were comprised of the following:

	June 30, 2013		December 31, 2012
Raw materials	$	21,320	$	22,514
Work-in-process		31,606		31,164
Finished goods		6,897		5,907
Supplies		10,813		11,084
	$	70,636	$	70,669