Restructuring (Tables)

3 Months Ended

Jul. 31, 2011

Restructuring (Tables) [Abstract]

Restructuring and related charges

							Site Preparation
	Long-Lived			Employee			and Equipment			Production
	Asset Charges			Separation			Relocation			Start-up			Other Costs			Total
Total expected restructuring charge	$	118,000		$	60,000		$	23,500		$	23,000		$	10,500		$	235,000
Balance at May 1, 2010	$	0		$	1,089		$	0		$	0		$	0		$	1,089
Charge to expense		53,569			36,010			6,192			5,194			992			101,957
Cash payments		0			(18,361	)		(6,192	)		(5,194	)		(992	)		(30,739	)
Noncash utilization		(53,569	)		(8,540	)		0			0			0			(62,109	)
Balance at April 30, 2011	$	0		$	10,198		$	0		$	0		$	0		$	10,198
Charge to expense		9,655			5,785			1,988			1,738			397			19,563
Cash payments		0			(3,505	)		(1,988	)		(1,738	)		(397	)		(7,628	)
Noncash utilization		(9,655	)		(909	)		0			0			0			(10,564	)
Balance at July 31, 2011	$	0		$	11,569		$	0		$	0		$	0		$	11,569
Remaining expected restructuring charge	$	50,906		$	17,066		$	14,913		$	16,052		$	8,832		$	107,769