Net Income Per Share and Weighted Average Shares (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	May 01, 2020	Jan. 31, 2020	Nov. 01, 2019	May 03, 2019	Feb. 01, 2019	Nov. 02, 2018	May 01, 2020	May 03, 2019
Net Income Per Share and Weighted Average Shares [Abstract]
Net income (loss) per share numerator	$ (161,932)	$ 61,168	$ 43,223	$ 50,414	$ 60,755	$ 47,207	$ (57,541)	$ 158,376
Net income (loss) per share denominator [Abstract]
Weighted average shares (in shares)	23,777,916			24,041,673			23,922,360	24,034,878
Add potential dilution [Abstract]
Nonvested stock awards and units (in shares)	0			62,759			0	55,748
Diluted weighted average shares (in shares)	23,777,916			24,104,432			23,922,360	24,090,626