Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Commitments and Contingencies Disclosure [Abstract]
Minimum operating lease term	1 year
Rent expense	$ 7,808	$ 6,724	$ 6,671

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration