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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 31, 2016 | May 31, 2015
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 627,261 | $ 497,293
Less accumulated depreciation and amortization | (200,669) | (179,932)
Property and equipment, net | 493,678 | 374,143
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | 6,221 | 1,571
Building |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 62,901 | $ 26,236
Building | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 25 years | 25 years
Building | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 38 years | 38 years
Equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 209,201 | $ 197,186
Equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 2 years | 2 years
Equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 10 years | 10 years
Software |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 290,997 | $ 248,137
Software | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 2 years | 2 years
Software | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 10 years | 10 years
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 40,452 | $ 20,458
Leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 3 years | 3 years
Leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 15 years | 15 years
Furniture and fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 17,489 | $ 3,705
Furniture and fixtures | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 3 years | 3 years
Furniture and fixtures | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Range of useful lives in years | 7 years | 7 years
Work in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment | $ 67,086 | $ 56,782

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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