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Fair Value Measurements (Narratives) (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Indefinite-lived trademark	$ 46,670,000	$ 46,981,000
Measurement Input, Long-term Revenue Growth Rate [Member] | Rest of Products [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.0191
Measurement Input, Long-term Revenue Growth Rate [Member] | Duff Norton Group [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.0568
Measurement Input, Cap Rate [Member] | Rest of Products [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.030
Measurement Input, Cap Rate [Member] | Duff Norton Group [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.035
Measurement Input, Discount Rate [Member] | Rest of Products [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.117
Measurement Input, Discount Rate [Member] | Duff Norton Group [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Goodwill, Fair Value Disclosure	0.122
Variable Annuity [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	2,059,000	2,285,000
Variable Annuity [Member] | (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	0	0
Variable Annuity [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	0	0
Variable Annuity [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Assets, Fair Value Disclosure	$ 2,059,000	$ 2,285,000

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Fair value portion of other assets.

+ References

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