Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Allowance for doubtful accounts	$ 28,963	$ 31,757
Preferred stock, shares authorized	20,030us-gaap_PreferredStockSharesAuthorized	20,030us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000us-gaap_CommonStockSharesAuthorized	200,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	87,504us-gaap_CommonStockSharesIssued	87,353us-gaap_CommonStockSharesIssued
Treasury stock, shares	12,477us-gaap_TreasuryStockShares	13,264us-gaap_TreasuryStockShares

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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