Leases - Assets and Liabilities (Details) $ in Thousands	Apr. 30, 2020 USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 31,997
Other current liabilities	5,343
Other long-term liabilities	26,820
Total operating lease liabilities	32,163
Finance lease, right-of-use asset	3,808
Other current liabilities	489
Other long-term liabilities	4,877
Total finance lease liabilities	$ 5,366
Weighted-aver remaining lease term - Operating leases	13 years 8 months 12 days
Weighted-aver remaining lease term - Finance leases	7 years 1 month 6 days
Weighted-average discount rate - Operating leases	3.40%
Weighted-average discount rate - Finance leases	9.70%