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Long-Term Leases and Commitments - Rental Expense under Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2011
Gross rentals $ 66,840 $ 30,641 $ 33,452
Sublease rentals (7,758) (11,332) (16,387)
Net rental expense $ 59,082 $ 19,309 $ 17,065