Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to pension plan	$ 1,400		$ 4,100
Components of net periodic benefit costs:
Service cost	906	$ 922	2,716	$ 2,766
Interest cost	1,916	1,783	5,750	5,349
Net actuarial loss	0	132	0	396
Net periodic benefit costs	2,822	2,837	8,466	8,511
Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Year	1,400		1,400
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Components of net periodic benefit costs:
Net actuarial loss	$ 0	$ 132	$ 0	$ 396