Significant Accounting Policies - Changes in Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Defined benefit plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	$ (2,879)	$ (9,237)	$ (2,597)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	(469)	1,276	116
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	(3,348)	(7,961)	(2,481)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	2,901	3,446	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	461	(476)	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	3,362	2,970	0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract]
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment and Tax	165	3,156	0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, Tax	(25)	(650)	0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax	140	2,506	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	(939)	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	182	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(757)	0	0
Total other comprehensive income (loss)
Total other comprehensive (loss) income - Pre-tax	(2,534)	(2,718)	(2,528)
Total other comprehensive (loss) income - Tax	532	159	121
Other comprehensive loss, net	(2,002)	(2,559)	(2,407)
Foreign currency cash flow hedges
Derivatives qualifying as hedges
Other comprehensive gain (loss) before reclassifications - Pre-tax	780	66	(164)
Other comprehensive gain (loss) before reclassifications - Tax	(178)	(7)	49
Other comprehensive gain (loss) before reclassifications - Net	602	59	(115)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(780)	(149)	233
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	178	16	(44)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(602)	(133)	189
Interest rate swap
Derivatives qualifying as hedges
Other comprehensive gain (loss) before reclassifications - Pre-tax	(2,320)	0	0
Other comprehensive gain (loss) before reclassifications - Tax	499	0	0
Other comprehensive gain (loss) before reclassifications - Net	(1,821)	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	538	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(116)	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 422	$ 0	$ 0