Inventories (Tables)

9 Months Ended

Sep. 30, 2011

Notes to Financial Statements [Abstract]

Inventories

7.   Inventories

	September 30, 2011			December 31, 2010
	(in thousands)
Raw materials and supplies	$	126,762		$	113,415
Work in process		34,743			26,358
Finished products		86,558			71,302
Inventory reserves		(36,481	)		(32,516	)
	$	211,582		$	178,559