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Schedule by Year of Maturities of Operating Leases Liabilities with Original Terms in Excess of One Year (Detail) - USD ($)
$ in Thousands
Apr. 30, 2019
Feb. 01, 2019
Leases [Abstract]    
2020 (excluding the three months ended April 30, 2019) $ 223,251  
2021 272,836  
2022 238,298  
2023 210,378  
2024 176,982  
Thereafter 635,363  
Total undiscounted future minimum lease payments 1,757,108  
Less imputed interest (450,485)  
Total discounted future minimum lease payments $ 1,306,623 $ 1,300,000