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Derivatives and Hedging (Tables) | 6 Months Ended
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Nov. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Schedule of Fair Values of Qualifying and Non-Qualifying Instruments Used in Hedging Transactions | The fair values of qualifying and non-qualifying instruments used in hedging transactions as of November 30, 2017 and May 31, 2017 are as follows:
(in thousands) |  |  |  | Fair Value |
Derivatives Designated as Hedging Instruments |  | Balance Sheet Location |  | November 30, 2017 |  |  | May 31, 2017 |
Assets: |  |  |  |  |  |  |  |  |  |  |
| Foreign Currency Exchange (Cash Flow) |  | Other Current Assets |  |  | 438 |  |  |  | 15 |
| Cross Currency Swap (Net Investment) |  | Other Current Assets |  |  | 1,905 |  |  |  | - |
| Interest Rate Swap (Fair Value) |  | Other Current Assets |  |  | 260 |  |  |  | - |
| Cross Currency Swap (Net Investment) |  | Other Assets (Long-Term) |  |  | 1,658 |  |  |  | - |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
| Foreign Currency Exchange (Cash Flow) |  | Other Accrued Liabilities |  |  | 29 |  |  |  | - |
| Cross Currency Swap (Net Investment) |  | Other Long-Term Liabilities |  |  | 6,807 |  |  |  | - |
| Interest Rate Swap (Fair Value) |  | Other Long-Term Liabilities |  |  | 994 |  |  |  | - |
(in thousands) |  |  |  | Fair Value |
Derivatives Not Designated as Hedging Instruments |  | Balance Sheet Location |  | November 30, 2017 |  |  | May 31, 2017 |
Assets: |  |  |  |  |  |  |  |  |  |  |
| Foreign Currency Exchange |  | Other Current Assets |  |  | 525 |  |  |  | 24 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
| Foreign Currency Exchange |  | Other Accrued Liabilities |  |  | 202 |  |  |  | - |

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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