Leases - Maturities of lease liabilities (Details) $ in Thousands	Oct. 31, 2019 USD ($)
Operating
Remaining 2020	$ 7,997
2021	9,436
2022	7,498
2023	6,664
2024	5,934
Thereafter	15,868
Total lease payments	53,397
Less: interest	(5,169)
Present value of lease liabilities	48,228
Finance
Remaining 2020	1,064
2021	1,425
2022	1,411
2023	1,399
2024	1,407
Thereafter	2,444
Total lease payments	9,150
Less: interest	(4,476)
Present value of lease liabilities	4,674
Total
Remaining 2020	9,061
2021	10,861
2022	8,909
2023	8,063
2024	7,341
Thereafter	18,312
Total lease payments	62,547
Less: interest	(9,645)
Total lease liabilities	$ 52,902