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Employee Benefit Plans (Plan Asset Details) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Defined benefit plans
Fair value of plan assets	$ 90,365	$ 84,718	$ 71,376
Level 1
Defined benefit plans
Fair value of plan assets	89,155	84,404
Level 2
Defined benefit plans
Fair value of plan assets	1,210	314
Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	10,737	18,355
Cash and cash equivalents | Level 1
Defined benefit plans
Fair value of plan assets	10,737	18,331
Cash and cash equivalents | Level 2
Defined benefit plans
Fair value of plan assets	0	24
Equity securities
Defined benefit plans
Fair value of plan assets	27,559	26,204
Equity securities | Level 1
Defined benefit plans
Fair value of plan assets	27,559	26,204
Equity securities | Level 2
Defined benefit plans
Fair value of plan assets	0	0
Debt securities
Defined benefit plans
Fair value of plan assets	26,823	25,150
Debt securities | Level 1
Defined benefit plans
Fair value of plan assets	26,823	25,150
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	21,659	12,096
Swiss real estate funds | Level 1
Defined benefit plans
Fair value of plan assets	21,659	12,096
Swiss real estate funds | Level 2
Defined benefit plans
Fair value of plan assets	0	0
Hedge funds
Defined benefit plans
Fair value of plan assets	912	0
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	912	0
Other
Defined benefit plans
Fair value of plan assets	2,675	2,913
Other | Level 1
Defined benefit plans
Fair value of plan assets	2,377	2,623
Other | Level 2
Defined benefit plans
Fair value of plan assets	$ 298	$ 290

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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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