Leases - Lease assets and liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2022	Jan. 31, 2022	Oct. 31, 2021
Assets and Liabilities, Lessee [Abstract]
Operating lease assets	$ 216,663	$ 169,595	$ 176,530
Classification of operating lease assets	Operating lease assets
Current operating lease liabilities	$ 50,645	42,763	45,117
Classification current operating lease liabilities	Current operating lease liabilities
Noncurrent operating lease liabilities	$ 185,171	142,868	147,688
Classification of noncurrent operating liabilities	Noncurrent operating lease liabilities
Total lease liabilities	$ 235,816	$ 185,631	$ 192,805