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, 2022	Jan. 31, 2021	Jan. 31, 2020
Change in benefit obligation:
Pension benefit obligation at beginning of period	$ 26,583	$ 24,813
Service cost	1,131	1,274	$ 1,121
Benefits (paid) deposited	515	(2,551)
Employee contributions	760	791
Actuarial losses	397	240
Foreign currency exchange rate impact	(1,084)	2,016
Pension benefit obligation at end of year	28,302	26,583	24,813
Change in plan assets:
Fair value of plan assets at beginning of period	25,837	24,227
Company contributions	1,142	1,187
Benefits (paid) deposited	515	(2,551)
Actual return on plan assets	1,914	220
Employee contributions	760	791
Foreign currency exchange rate impact	(1,072)	1,963
Fair value of plan assets at end of year	29,096	25,837	$ 24,227
Funded status - consolidated	794	(746)
Amounts recognized in the consolidated balance sheets consist of:
Other non-current assets	794
Other non-current liabilities		746
Amounts recognized in accumulated other comprehensive income/(loss):
Prior service cost	358	448
Net actuarial (gain)/loss	(618)	511
Tax effect	55	(209)
Net amount recognized, after tax	(205)	750
Accumulated benefit obligation	$ 28,142	$ 26,390