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Lease Termination and Impairment Charges (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Nov. 30, 2019
Dec. 01, 2018
Nov. 30, 2019
Dec. 01, 2018
Lease Termination and Impairment Charges        
Long-lived assets held and used, impairment charges $ 121 $ 727 $ 1,533 $ 34,572
Lease termination charges   1,901   17,524
Facility exit charges 45   582  
Lease termination and impairment charges $ 166 $ 2,628 $ 2,115 $ 52,096