Benefit Plans (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 27,818 | $ 25,935 | $ 24,037 |
| Defined Contribution Plan, Fair Value of Plan Assets | $ 668,960 | ||
| STERIS Corporation shares held in defined contribution plan | 555,080 | ||
| Fair value of STERIS Corporatio stock held in defined contribution plan | $ 77,695 | ||
| Defined Contribution Plan, Dividends Paid | 855 | 826 | $ 781 |
| Deferred Compensation Plan Assets | $ 1,273 | $ 1,400 | |
| 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% | ||