Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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Goodwill and Intangible Assets (Narrative) (Details)	3 Months Ended		12 Months Ended
Goodwill and Intangible Assets (Narrative) (Details)	Jun. 30, 2019 USD ($) Reporting_Unit	Jun. 30, 2018 USD ($)	Mar. 31, 2020	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Number of Reporting Units \| Reporting_Unit	2
Amortization of intangibles	$ 3,253,000	$ 3,903,000
Goodwill	325,301,000			$ 322,816,000
Estimated amortization expense in 2019	13,000,000
Estimated amortization expense in 2020	13,000,000
Estimated amortization expense in 2021	13,000,000
Estimated amortization expense in 2022	13,000,000
Indefinite-Lived Trademarks	47,239,000			46,981,000
Goodwill, Impaired, Accumulated Impairment Loss	113,174,000			113,174,000
Rest of Products [Member]
Goodwill [Line Items]
Goodwill	315,675,000			313,205,000
Duff Norton Group [Member]
Goodwill [Line Items]
Goodwill	$ 9,626,000			$ 9,611,000
Scenario, Forecast [Member]
Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			18 years
Scenario, Forecast [Member] \| Trademark
Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			14 years
Scenario, Forecast [Member] \| Customer relationships
Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			18 years
Scenario, Forecast [Member] \| Patented Technology [Member]
Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			18 years
Scenario, Forecast [Member] \| Other Intangible Assets [Member]
Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			6 years