Net Income Per Share and Weighted Average Shares (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jan. 31, 2020	Nov. 01, 2019	Feb. 01, 2019	Nov. 02, 2018	Jan. 31, 2020	Feb. 01, 2019
Net Income Per Share and Weighted Average Shares [Abstract]
Net income per share numerator	$ 61,168	$ 43,223	$ 60,755	$ 47,207	$ 104,391	$ 107,962
Net income per share denominator [Abstract]
Weighted average shares (in shares)	23,950,811		24,040,374		23,994,583	24,031,480
Add potential dilution [Abstract]
Nonvested stock awards and units (in shares)	55,006		53,351		60,287	52,243
Diluted weighted average shares (in shares)	24,005,817		24,093,725		24,054,870	24,083,723