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Technology, Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2016
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | $ 634,195 | $ 579,608 |
Accumulated depreciation and amortization | (344,261) | (336,550) |
Total | 289,934 | 243,058 |
Net book value of capitalized software costs | 198,000 | 192,700 |
Capitalized software amortization expense | 45,449 | 48,343 | $ 49,642
Depreciation and amortization expense excluding capitalized software | 18,878 | 18,340 | 16,785
Total depreciation and amortization expense for technology, property, and equipment | 64,327 | 66,683 | $ 66,427
Fully depreciated capitalized software and computer hardware written off | 51,800 |  |
Capitalized Software [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | 390,774 | 356,907 |
Computer Hardware [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | 57,493 | 60,467 |
Buildings and Leasehold Improvements [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | 121,381 | 103,774 |
Furniture, Fixtures and Warehouse Equipment [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | 60,869 | 55,106 |
Land and Land Improvements [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Technology, property and equipment, gross | $ 3,678 | $ 3,354 |

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