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Employee Benefit Plans (Deferred Compensation Plan Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Deferred Compensation Plan
Fair value of marketable securities	$ 20,085	$ 20,363
Deferred Compensation Plan
Deferred Compensation Plan
Percentage of vested salary and incentive compensation deferrals permitted to eligible employees	100.00%
Deferred Compensation Plan | Other assets
Deferred Compensation Plan
Fair value of marketable securities	$ 20,100	20,400
Level 1 | Fair Value, Measurements, Recurring
Deferred Compensation Plan
Fair value of marketable securities	$ 20,085	$ 20,363

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- Definition

Deferred Compensation Plan Compensation Deferrals Percentage Allowed

+ References

No definition available.

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- Definition

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+ References

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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