Significant Accounting Policies - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	$ 676,954
Ending Balance	698,743	$ 676,954
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(9,502)	(4,511)	$ (2,030)
Other comprehensive (loss) income	14	(4,991)	(2,481)
Ending Balance	(9,488)	(9,502)	(4,511)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Foreign Currency Hedge
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	0	74	0
Other comprehensive (loss) income	0	(74)	74
Ending Balance	0	0	74
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Interest rate swap
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	0	0	0
Other comprehensive (loss) income	(1,399)	0	0
Ending Balance	(1,399)	0	0
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	2,506	0	0
Other comprehensive (loss) income	(617)	2,506	0
Ending Balance	1,889	2,506	0
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	830	830	830
Other comprehensive (loss) income	0	0	0
Ending Balance	830	830	830
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Beginning Balance	(6,166)	(3,607)	(1,200)
Other comprehensive (loss) income	(2,002)	(2,559)	(2,407)
Ending Balance	$ (8,168)	$ (6,166)	$ (3,607)