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Employee Retirement Plans (Expected Return on Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Interest cost	$ 2,380	$ 2,529	$ 456
Expected return on assets	(3,070)	(2,901)	(462)
Net periodic benefit cost (income)	$ (690)	$ (372)	$ (6)

X

- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 55
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X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
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- References

No definition available.

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