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Property and Equipment, Net - Summary of Property and Equipment (Detail) - USD ($)
$ in Thousands
Apr. 30, 2019
Jan. 31, 2019
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,323,215 $ 1,197,144
Less accumulated depreciation and amortization (437,426) (400,237)
Property and equipment, net 885,789 796,907
Land and land improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 34,050 22,694
Buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 469,405 433,863
Computers, equipment, and software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 599,584 539,090
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 46,339 38,840
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 173,837 162,657
Construction in progress for owned real estate projects    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 413,000 $ 355,000