Supplemental Financial Information (Tables)

12 Months Ended

Mar. 31, 2011

Notes to Financial Statements [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

A summary of additions and deductions related to the allowance for doubtful accounts for the years ended March 31, 2011, 2010 and 2009 follows (amounts in thousands):

	Balance at Beginning of Year		Charged to Costs and Expenses		Deductions (1)			Balance at End of Year
Allowance for doubtful accounts:
2011	$	3,109	$	31	$	(302	)	$	2,838
2010		3,176		90		(157	)		3,109
2009		3,152		132		(108	)		3,176

(1) Deductions represent uncollectible accounts written off, net of recoveries.