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Supplementary Information Other Long-Term Liability (Details) - USD ($)
$ in Thousands
Jan. 28, 2017
Apr. 30, 2016
Jan. 30, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]      
Liability for Uncertain Tax Positions, Noncurrent $ 69,371 $ 69,345 $ 63,459
Deferred Rent Credit, Noncurrent 4,194 4,164 4,662
Other Sundry Liabilities, Noncurrent 2,631 1,871 1,816
Other Liabilities, Noncurrent $ 76,196 $ 75,380 $ 69,937