Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 15,203	$ (4,104)	$ 7,940	$ (7,073)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(4,226)	6,631	(2,150)	9,433
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	212	10,071	115	11,940
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(7,009)	16,784	(4,934)	21,442
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	8,194	12,680	3,006	14,369
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	(74)	(2,817)	(40)	(3,339)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(2,995)	82	(2,899)	69
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	986	(24)	$ 955	$ (20)
AOCI Attributable to Parent
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	0
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(4,226)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	212	10,071
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ (2,995)	$ 82