Benefit Plans (Change in benefit obligations funded status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	$ 153	$ 160
Defined benefit plan repayment of obligation [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	4,103
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	1,190
Defined Benefit Plan, Benefit Obligation	8,525	10,016	$ 11,368
Defined Benefit Plan, Service Cost	0	0	0
Defined benefit plan, change in benefit obligation, interest cost	232	317
Defined Benefit Plan, Actuarial Net (Gains) Losses	(640)	(114)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	1,083	1,555
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(1,083)	(1,555)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	0
Defined Benefit Plan, Plan Assets, Amount	0	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	1,083	1,555
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(8,525)	(10,016)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	0	0
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	0	0
Other Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	5,560
Defined Benefit Plan, Benefit Obligation	129,772	149,200	123,190
Defined Benefit Plan, Service Cost	1,616	1,357	1,380
Defined benefit plan, change in benefit obligation, interest cost	2,820	2,816
Defined Benefit Plan, Actuarial Net (Gains) Losses	(12,177)	12,622
Defined Benefit Plan, Benefit Obligation, Benefits Paid	5,375	4,714
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	897	1,031
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(5,325)	(4,714)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(1,334)	0
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	897	1,031
Defined Benefit Plan, Plan Assets, Amount	142,172	145,452	$ 112,203
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	3,421	19,252
Defined Benefit Plan, Plan Assets, Contributions by Employer	5,533	5,329
Defined Benefit Plan, Funded (Unfunded) Status of Plan	12,400	(3,748)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	(1,334)	0
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(6,472)	12,351
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	$ (5,875)	$ 12,898