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Leases - Reconciliation of Future Undiscounted Cash Flows to Operating and Finance Leases (Details) - USD ($)
$ in Thousands
Jan. 31, 2021
Apr. 30, 2020
Operating leases    
2021 $ 6,036  
2022 21,984  
2023 21,009  
2024 19,101  
2025 16,902  
Thereafter 57,709  
Total lease payments 142,741  
Less imputed interest (15,367)  
Operating lease liabilities 127,374  
Current maturities (18,435) $ (18,896)
Long-term lease liability - operating 108,939 112,454
Lease assets 121,600 $ 127,668
Financing leases    
2021 639  
2022 1,966  
2023 1,500  
2024 1,137  
2025 325  
Thereafter 95  
Total lease payments 5,662  
Less imputed interest (240)  
Finance Lease, Liability 5,422  
Current maturities (2,044)  
Lease liability - long-term 3,378  
Lease assets $ 9,915