Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 15,813	$ 14,114	$ 25,088	$ 22,505
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(9,683)	(10,781)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(265)	4,686
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	208	(166)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(10,156)	(5,929)	(6,672)	(11,795)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	5,657	8,185	18,416	10,710
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	86	(1,509)	(90)	(2,375)
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	27	(56)	22	(105)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	853,998	784,384	853,998	784,384
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	(9,683)	(10,781)	(6,782)	(19,482)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(265)	4,686	276	7,375
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	208	(166)	166	(312)
Retained Earnings
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	15,813	14,114	$ 25,088	$ 22,505
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	$ 0	$ 0