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Employee Benefit Plans (Plan Asset Details) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Defined benefit plans
Fair value of plan assets	$ 128,061	$ 98,010	$ 90,365
Level 1
Defined benefit plans
Fair value of plan assets	116,692	87,707
Level 2
Defined benefit plans
Fair value of plan assets	11,369	10,303
Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	21,715	14,213
Cash and cash equivalents | Level 1
Defined benefit plans
Fair value of plan assets	21,715	14,213
Cash and cash equivalents | Level 2
Defined benefit plans
Fair value of plan assets	0	0
Equity securities
Defined benefit plans
Fair value of plan assets	38,437	28,329
Equity securities | Level 1
Defined benefit plans
Fair value of plan assets	38,437	28,329
Equity securities | Level 2
Defined benefit plans
Fair value of plan assets	0	0
Debt securities
Defined benefit plans
Fair value of plan assets	31,034	26,605
Debt securities | Level 1
Defined benefit plans
Fair value of plan assets	31,034	26,605
Debt securities | Level 2
Defined benefit plans
Fair value of plan assets	0	0
Swiss real estate funds
Defined benefit plans
Fair value of plan assets	29,143	24,644
Swiss real estate funds | Level 1
Defined benefit plans
Fair value of plan assets	20,802	16,476
Swiss real estate funds | Level 2
Defined benefit plans
Fair value of plan assets	8,341	8,168
Hedge funds
Defined benefit plans
Fair value of plan assets	2,730	1,882
Hedge funds | Level 1
Defined benefit plans
Fair value of plan assets	0	0
Hedge funds | Level 2
Defined benefit plans
Fair value of plan assets	2,730	1,882
Other
Defined benefit plans
Fair value of plan assets	5,002	2,337
Other | Level 1
Defined benefit plans
Fair value of plan assets	4,704	2,084
Other | Level 2
Defined benefit plans
Fair value of plan assets	$ 298	$ 253

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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