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Employee Benefit Plans (Projected Benefit Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Changes in projected benefit obligations
Projected benefit obligations, beginning of the year	$ 143,662	$ 128,915
Service costs	11,008	10,564	$ 9,715
Interest costs	1,055	1,301	1,126
Plan participant contributions	3,733	3,666
Actuarial gains	2,246	9,506
Benefits paid	(3,507)	(3,793)
Plan amendment related to statutory change	0	(705)
Settlement	(941)	(335)
Administrative expense paid	(141)	(142)
Currency exchange rate changes and other	3,799	(5,315)
Projected benefit obligations, end of the year	$ 160,914	$ 143,662	$ 128,915

X

- Definition

Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement And Curtailment

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- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of administration expense of defined benefit plan which decreases plan assets. Excludes plan administration expense paid by employer.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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