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RECEIVABLES (Tables) | 3 Months Ended
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Aug. 31, 2015
Summary of Accounts Receivable | A summary of accounts receivable as of August 31, 2015 and May 31, 2015 is as follows (in thousands):
|  | August 31, 2015 |  |  | May 31, 2015 |
|  | (unaudited) |  |  |  |
Trade accounts receivable |  | $ | 183,950 |  |  | $ | 197,322 |
Unbilled revenues |  |  | 29,665 |  |  |  | 18,387 |
Allowance for doubtful accounts |  |  | (3,475 | ) |  |  | (2,775 | )
Total |  | $ | 210,140 |  |  | $ | 212,934 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Period Type: | duration