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Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Item] |  |  |
Remaining shares available for grant | 2,794,795 |  |
Weighted-average assumptions used for options granted: |  |  |
Risk-free interest rate | 2.44% | 1.10% | 0.46%
Expected life of options | 5 years 10 months 24 days | 5 years 10 months 24 days | 6 years
Exptected dividend yield of stock | 0.80% | 0.95% | 0.96%
Expected volatility of stock | 24.49% | 24.27% | 23.04%
Estimated forfeiture rate | 2.54% | 2.85% | 2.78%
Summary of share option activity: |  |  |
Number of Options, Outstanding, Beginning of Period | 1,560,954 |  |
Weighted Average Exercise Price, Outstanding, Beginning of Period | $ 138.37 |  |
Number of Options, Granted | 235,435 |  |
Weighted Average Exercise Price, Granted | $ 247.45 |  |
Number of Options, Exercised | (37,732) |  |
Weighted Average Exercise Price, Exercised | $ 50.86 |  |
Number of Options, Forfeited | (8,928) |  |
Weighted Average Exercise Price, Forfeited | $ 205.25 |  |
Number of Options, Outstanding, End of Period | 1,749,729 | 1,560,954 |
Weighted Average Exercise Price, Outstanding, End of Period | $ 154.60 | $ 138.37 |
Average Remaining Contractual Term, Outstanding | 6 years 2 months 12 days |  |
Aggregate Intrinsic Value, Outstanding | $ 83,950 |  |
Number of Options, Exercisable | 1,124,664 |  |
Weighted Average Exercise Price, Exercisable | $ 122.41 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term | 5 years 2 months 12 days |  |
Aggregate Intrinsic Value, Exercisable | $ 79,561 |  |
Non-vested stock options outstanding expected to vest | 614,758 |  |
Common Stock, Fair Market Value Per Share | $ 191.28 |  |
Total intrinsic value of stock options exercised | $ 6,502 | $ 52,952 | $ 39,055
Net cash proceeds from the exercise of stock options | 1,828 | 10,071 | 26,726
Tax benefit from stock option exercises | $ 4,945 | $ 18,143 | $ 11,559
Weighted average grant date fair value of stock option grants, per share | $ 50.72 | $ 37.52 | $ 27.66
Summary of non-vested restricted share activity: |  |  |
Number of Restricted Shares, Non-vested at Beginning of Period | 33,677 |  |
Number of Restricted Shares, Granted | 13,884 |  |
Number of Restricted Shares, Vested | (16,335) |  |
Number of Restricted Shares, Canceled | (2,684) |  |
Number of Restricted Shares, Non-vested at End of Period | 28,542 | 33,677 |
Unrecognized compensation cost related to nonvested share-based compensation granted | $ 64,814 |  |
Weighted average period for recognition of unrecognized compensation cost | 2 years 1 month 6 days |  |
Restricted Stock |  |  |
Summary of non-vested restricted share activity: |  |  |
Number of Restricted Shares, Non-vested at Beginning of Period | 485,510 |  |
Weighted-Average Grant Date Fair Value, Non-vested at Beginning of Period | $ 157.37 |  |
Number of Restricted Shares, Granted | 131,650 |  |
Weighted-Average Grant Date Fair Value, Granted | $ 223.57 |  |
Number of Restricted Shares, Vested | (148,828) |  |
Weighted-Average Grant Date Fair Value, Vested | $ 127.98 |  |
Number of Restricted Shares, Canceled | (17,539) |  |
Weighted-Average Grant Date Fair Value, Canceled | $ 182.75 |  |
Number of Restricted Shares, Non-vested at End of Period | 450,793 | 485,510 |
Weighted-Average Grant Date Fair Value, Non-vested at End of Period | $ 186.60 | $ 157.37 |
Fair Value, Share-based Payment Awards, Other than Options | $ 21,154 |  |
RSUs Cantel |  |  |
Summary of non-vested restricted share activity: |  |  |
Number of Restricted Shares, Non-vested at Beginning of Period | 45,722 |  |
Weighted-Average Grant Date Fair Value, Non-vested at Beginning of Period | $ 191.18 |  |
Number of Restricted Shares, Granted | 0 |  |
Weighted-Average Grant Date Fair Value, Granted | $ 0 |  |
Number of Restricted Shares, Vested | (25,470) |  |
Weighted-Average Grant Date Fair Value, Vested | $ 191.18 |  |
Number of Restricted Shares, Canceled | (4,582) |  |
Weighted-Average Grant Date Fair Value, Canceled | $ 191.18 |  |
Number of Restricted Shares, Non-vested at End of Period | 15,670 | 45,722 |
Weighted-Average Grant Date Fair Value, Non-vested at End of Period | $ 191.18 | $ 191.18 |
Unrecognized compensation cost related to nonvested share-based compensation granted | $ 1,563 |  |
Weighted average period for recognition of unrecognized compensation cost | 7 months 6 days |  |
Restricted Stock Units (RSUs) |  |  |
Summary of share option activity: |  |  |
Weighted average grant date fair value of stock option grants, per share |  | $ 191.18 |
Summary of non-vested restricted share activity: |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Conversion Ratio |  | 0.4262 |
Share-Based Payment Arrangement, Expense |  | $ 20,200 |
Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Weighted Average Grant Date Fair Value |  | 53,607 |
Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Weighted Average Grant Date Fair Value Attributable to Pre-Acquisition Services |  | $ 18,173 |
Weighted Average Number of Shares, Restricted Stock |  | 280,402 |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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