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Summary of Significant Accounting Policies and Practices (Tables) | 3 Months Ended
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Aug. 31, 2013
Summary of Goodwill | A summary of goodwill is as follows (in thousands):
|  | Three Months Ended August 31, 2013 |
|  | MS |  |  | IHT |  |  | Quest |  |  | Total |
Balance at May 31, 2013 |  | $ | 19,130 |  |  | $ | 53,800 |  |  | $ | 30,536 |  |  | $ | 103,466 |
Acquisitions |  |  | — |  |  |  | 5,827 |  |  |  | — |  |  |  | 5,827 |
Foreign currency adjustments |  |  | 259 |  |  |  | (318 | ) |  |  | (257 | ) |  |  | (316 | )
Balance at August 31, 2013 |  | $ | 19,389 |  |  | $ | 59,309 |  |  | $ | 30,279 |  |  | $ | 108,977 |
Amounts Used In Basic and Diluted Earnings Per Share | Amounts used in basic and diluted earnings per share, for the three months ended August 31, 2013 and 2012, are as follows (in thousands):
|  | Three Months Ended August 31, |
|  | 2013 |  |  | 2012 |
Weighted-average number of basic shares outstanding |  |  | 20,503 |  |  |  | 19,874 |
Stock options, stock units and performance awards |  |  | 699 |  |  |  | 775 |
Assumed conversion of non-controlling interest |  |  | 197 |  |  |  | 217 |
Total shares and dilutive securities |  |  | 21,399 |  |  |  | 20,866 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 + Details
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