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Subsequent Event (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
Subsequent Event (Narrative) (Details) (USD $)	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Subsequent Event [Abstract]
Charges related to customer filing bankruptcy		$ 32,000,000
Inventory write-down		4,000,000
Selling, general and administrative expenses	$ 28,000,000	$ 880,636,000	$ 804,890,000	$ 755,064,000

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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