Pension and Retirement Savings Plan - Components of Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1,131	$ 1,274	$ 1,121
Interest cost			300
Expected return on assets	(395)	(372)	(205)
Actuarial gain recognized due to partial settlement		(43)
Amortization of prior service costs	74	73	68
Net Periodic Pension Cost	$ 810	$ 932	$ 1,284