Computation of Earnings per Common Share - Basic and Diluted Earnings Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 27, 2024	Oct. 28, 2023	Jul. 29, 2023	Apr. 29, 2023	Jan. 28, 2023	Oct. 29, 2022	Jul. 30, 2022	Apr. 30, 2022	Jan. 27, 2024	Jan. 28, 2023	Jan. 29, 2022	Sep. 15, 2015
Basic earnings per unit
Net income	$ 23,418	$ 83,736	$ 60,246	$ 51,523	$ 24,809	$ 54,012	$ 43,856	$ 19,536	$ 218,923	$ 142,213	$ 48,574
Weighted-average number of common shares (in shares)									29,333,054	29,549,990	30,337,544
Basic earnings per common share (in dollars per share)	$ 0.80	$ 2.85	$ 2.05	$ 1.75	$ 0.84	$ 1.83	$ 1.48	$ 0.66	$ 7.46	$ 4.81	$ 1.60
Diluted earnings per unit
Weighted-average number of common shares (in shares)									29,333,054	29,549,990	30,337,544
Potential common stock arising from stock options, and unvested restricted share units (in shares)									365,872	446,601	506,667
Total shares-diluted (in shares)									29,698,926	29,996,591	30,844,211
Diluted earnings per common share (in dollars per share)	$ 0.79	$ 2.82	$ 2.03	$ 1.73	$ 0.83	$ 1.80	$ 1.46	$ 0.65	$ 7.37	$ 4.74	$ 1.57
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)									167,914	98,530	1,004,953
0.75% Convertible Senior Notes Due 2021
Diluted earnings per unit
Debt, interest rate (in percent)												0.75%
Stock-based awards
Diluted earnings per unit
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)									167,914	98,530	91,816
Convertible senior notes
Diluted earnings per unit
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)									0	0	375,013
Warrants
Diluted earnings per unit
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)									0	0	538,124