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Accumulated Other Comprehensive Income (loss) (Table Text Block) | 3 Months Ended
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Jun. 30, 2019
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, 2019 | $ | (56,612) | $ | (7,259) | $ | 107 | $ | (2,934) | $ | (66,698)
Foreign currency translation |  | 2,982 |  | 0 |  | 0 |  | 0 |  | 2,982
Unrealized net gain on investments |  | 0 |  | 40,788 |  | 0 |  | 0 |  | 40,788
Change in fair value of cash flow hedges |  | 0 |  | 0 |  | (945) |  | 0 |  | (945)
Other comprehensive income (loss) |  | (2,093) |  | 40,788 |  | (945) |  | 0 |  | 42,825
Balance at June 30, 2019 | $ | (58,705) | $ | 33,529 | $ | (838) | $ | (2,934) | $ | (23,873)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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