Pension and Retirement Savings Plan - Reconciliation of Change in Benefit Obligation, Change in Plan Assets and Net Amount Recognized in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Change in benefit obligation:
Pension benefit obligation at beginning of period	$ 28,302	$ 26,583
Service cost	1,138	1,131	$ 1,274
Interest cost	57
Benefits deposited	20	515
Employee contributions	802	760
Actuarial (gains)/losses	(1,566)	397
Foreign currency exchange rate impact	356	(1,084)
Pension benefit obligation at end of year	29,109	28,302	26,583
Change in plan assets:
Fair value of plan assets at beginning of period	29,096	25,837
Company contributions	1,205	1,142
Benefits deposited	20	515
Actual (loss)/return on plan assets	(3,446)	1,914
Employee contributions	802	760
Foreign currency exchange rate impact	288	(1,072)
Fair value of plan assets at end of year	27,965	29,096	$ 25,837
Funded status - consolidated	(1,144)	794
Amounts recognized in the consolidated balance sheets consist of:
Other non-current assets		794
Other non-current liabilities	(1,144)
Amounts recognized in accumulated other comprehensive income/(loss):
Prior service cost	288	358
Net actuarial loss/(gain)	1,899	(618)
Tax effect	(467)	55
Net amount recognized, after tax	1,720	(205)
Accumulated benefit obligation	$ 28,997	$ 28,142