Earnings Per Share - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 29, 2017	Apr. 30, 2016	Jan. 28, 2017
Earnings Per Share [Abstract]
Stock repurchased during period (in shares)	275,300	1,099,900
Stock repurchased during period, value	$ 16,163,000	$ 73,400,000	$ 133,263,000
Stock repurchase program, remaining authorized repurchase amount	24,000,000
Stock repurchase program, authorized amount	$ 100,000,000