Property, Plant And Equipment (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant And Equipment [Abstract]

Schedule Of Property, Plant And Equipment

	2011			2010
Land	$	13,509		$	12,897
Building and improvements		135,049			129,881
Plant and equipment		2,039,050			1,963,186
Other		147,342			133,241
		2,334,950			2,239,205
Less: Accumulated depreciation		(1,196,845	)		(1,098,792	)
		1,138,105			1,140,413
Construction in progress		93,961			29,921
Property, plant and equipment, net	$	1,232,066		$	1,170,334