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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Jun. 30, 2003 Y	Feb. 28, 2012	Feb. 28, 2011
Commitments And Contingencies [Abstract]
Land lease term (years)	51
Prepaid land lease rent	$ 28.0
Prepaid land lease adjustments term (years)	10
Rental expense		3.8	3.2
Long-term income tax liabilities		$ 45.3

Carrying amount as of the balance sheet date of rental payments made in advance of the rental period; such amounts will be charged against earnings within one year or the normal operating cycle, if longer.

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