Accumulated Other Comprehensive Income	12 Months Ended
	Mar. 31, 2021
Disclosure Text Block [Abstract]
Other Comprehensive Income Noncontrolling Interest [Text Block]	Note 12.   Accumulated Other Comprehensive Income (Loss) A summary of our AOCI components, net of tax, were as follows:       Foreign Currency Translation   Unrealized Net Gain on Investments   Fair Value of Cash Flow Hedges   Postretirement Benefit Obligation Net Loss   Accumulated Other Comprehensive Income (Loss)           (In thousands) Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652 Foreign currency translation   (5,694)   -   -   -   (5,694) Unrealized net gain on investments   -   76,969   -   -   76,969 Change in fair value of cash flow hedges   -   -   (429)   -   (429) Amounts reclassified into earnings on hedging activities   -   -   2,746   -   2,746 Change in post retirement benefit obligaitons   -   -   -   (1,387)   (1,387) Other comprehensive income (loss)   (5,694)   76,969   2,317   (1,387)   72,205 Balance as of March 31, 2021 $ (52,929) $ 167,653 $ (3,879) $ (3,988) $ 106,857