Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventories

Schedule of inventories

	December 31,
	2011		2010
	(in thousands)
Finished goods	$	323,315	$	110,788
Raw materials and precious metals		157,931		89,333
In-process inventories		115,372		22,931
Parts and supplies		39,603		24,120
	$	636,221	$	247,172