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Comprehensive Income (loss) (Table Text Block) | 6 Months Ended
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Sep. 30, 2017
Table Text Block Supplement [Abstract] |
Summary of accumulated other comprehensive income (loss) components, net of tax |
|  | Foreign Currency Translation |  | Unrealized Net Gain on Investments |  | Fair Market Value of Cash Flow Hedges |  | Postretirement Benefit Obligation Net Loss |  | Accumulated Other Comprehensive Income (Loss)
|  | (Unaudited)
|  | (In thousands)
Balance at March 31, 2017 | $ | (69,505) | $ | 23,099 | $ | (3,059) | $ | (1,771) | $ | (51,236)
Foreign currency translation |  | 21,034 |  | – |  | – |  | – |  | 21,034
Unrealized net gain on investments |  | – |  | 16,968 |  | – |  | – |  | 16,968
Change in fair value of cash flow hedges |  | – |  | – |  | 4,318 |  | – |  | 4,318
Amounts reclassified from AOCI |  | – |  | – |  | (2,618) |  | – |  | (2,618)
Other comprehensive income (loss) |  | 21,034 |  | 16,968 |  | 1,700 |  | – |  | 39,702
Balance at September 30, 2017 | $ | (48,471) | $ | 40,067 | $ | (1,359) | $ | (1,771) | $ | (11,534)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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