Goodwill and Other Intangibles (Tables)

12 Months Ended

Mar. 31, 2013

Goodwill and Other Intangibles [Abstract]

Goodwill and Intangible Asset Rollforward

Goodwill and Intangible Asset Rollforward:

			Amortizable Intangibles
	Unamortizable Goodwill (1)		Customer Relationship Intangible			Production and Supply Contract Intangibles			Internally Developed Software Intangible			Total
Weighted average remaining useful life in years as of March 31, 2013			12			3			1
March 31, 2011 balance:
Gross carrying amount	$	2,794	$	33,700		$	7,893		$	15,767		$	60,154
Accumulated amortization	—		(9,899		)	(1,948		)	(7,102		)	(18,949		)
Net March 31, 2011 balance	2,794		23,801			5,945			8,665			41,205
Additions	—		—			—			821			821
Impairment / other	—		—			—			(357		)	(357		)
Amortization expense	—		(1,685		)	(1,095		)	(3,024		)	(5,804		)
Net March 31, 2012 balance	2,794		22,116			4,850			6,105			35,865
Additions	—		—			—			976			976
Amortization expense	—		(1,685		)	(614		)	(3,071		)	(5,370		)
Net March 31, 2013 balance	$	2,794	$	20,431		$	4,236		$	4,010		$	31,471

Estimated Intangible Asset Amortization Expense

For Fiscal Years Ended	Customer Relationship Intangible		Production and Supply Contract Intangible		Internally     Developed     Software    Intangible *		Total
2014	$	1,685	$	1,251	$	2,063	$	4,999
2015	1,685		1,173		729		3,587
2016	1,685		1,812		599		4,096
2017	1,685		—		424		2,109
2018	1,685		—		195		1,880
Later	12,006		—		—		12,006
	$	20,431	$	4,236	$	4,010	$	28,677

*  Estimated amortization expense for the internally developed software is based on costs accumulated as of March 31, 2013.
    These estimates will change as new costs are incurred and until the software is placed into service in all locations.