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Benefit Plans (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 25,935 | $ 24,037 | $ 22,676
Defined Contribution Plan, Fair Value of Plan Assets | $ 703,740 |  |
STERIS Corporation shares held in defined contribution plan | 617,900 |  |
Fair value of STERIS Corporatio stock held in defined contribution plan | $ 79,110 |  |
Defined Contribution Plan, Dividends Paid | 826 | 781 | $ 734
Deferred Compensation Plan Assets | $ 1,400 | $ 1,583 |
Equity Securities [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 75.00% |  |
Debt Securities |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 25.00% |  |

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- Definition Defined Contribution Plan, Fair Value of Plan Assets + References No definition available. + Details
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- Definition Fair value of STERIS Corporatio stock held in defined contribution plan + References No definition available. + Details
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- Definition STERIS Corporation shares held in defined contribution plan + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Details
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