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Income Taxes - Differences Between Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate (Detail)
3 Months Ended 12 Months Ended
May 01, 2016
Jan. 31, 2016
Nov. 01, 2015
Aug. 02, 2015
May 03, 2015
Feb. 01, 2015
Nov. 02, 2014
Aug. 03, 2014
May 01, 2016
May 03, 2015
Apr. 27, 2014
Income Tax Disclosure [Abstract]                      
federal income tax rate                 34.00% 34.00% 34.00%
tax effects of Chinese foreign exchange gains                 4.40% 0.30% (1.30%)
change in valuation allowance                 (1.20%) (0.20%) 0.10%
change in North Carolina income tax rates                 0.70%   1.80%
undistributed earnings from foreign subsidiaries                     (26.30%)
other                 1.40% 0.20% 0.10%
Effective income tax rate 49.80% 32.30% 38.60% 36.50% 26.50% 35.60% 38.60% 38.70% 39.30% 34.30% 8.40%