Share-Based Compensation Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Item]
Remaining shares available for grant	2,386,686
Weighted-average assumptions used for options granted:
Risk-free interest rate	3.57%	2.41%
Expected life of options	5 years 10 months 24 days	5 years 9 months 18 days
Exptected dividend yield of stock	1.08%	0.80%
Expected volatility of stock	27.98%	24.45%
Estimated forfeiture rate	2.22%	2.54%
Summary of share option activity:
Outstanding at the beginning of the period	1,749,729
Granted	241,456
Exercised	(31,342)
Forfeited	(2,128)
Outstanding at the end of the period	1,957,715
Exercisable at the end of the period	1,336,601
Weighted average exercise price:
Outstanding at March 31, 2023	$ 154.60
Granted	219.97
Exercised	57.18
Forfeited	200.46
Outstanding at June 30, 2023	164.17
Exercisable at June 30, 2023	$ 136.78
Average Remaining Contractual Term, Outstanding at the end of the period	6 years 6 months
Aggregate Intrinsic Value, Outstanding at the end of the period	$ 124,831
Average Remaining Contractual Term, Exercisable at the end of the period	5 years 6 months
Aggregate Intrinsic Value, Exercisable at the end of the period	$ 119,338
Non-vested stock options outstanding expected to vest	601,967
Ordinary shares, closing price	$ 224.98
Total intrinsic value of stock options exercised	$ 4,831	$ 3,897
Net cash proceeds from the exercise of stock options	$ 1,254	$ 1,221
Weighted average grant date fair value of stock option grants, per share	$ 53.45	$ 50.04
Summary of non-vested restricted share activity:
Unrecognized compensation cost related to nonvested share-based compensation granted	$ 99,504
Weighted Average Period For Total Compensation Expense Not Yet Recognized	2 years
Restricted Stock
Summary of non-vested restricted share activity:
Number of Restricted Shares, Non-vested at Beginning of Period	450,793
Weighted-Average Grant Date Fair Value, Non-vested at Beginning of Period	$ 186.60
Number of Restricted Shares, Granted	166,999
Weighted-Average Grant Date Fair Value, Granted	$ 199.92
Number of Restricted Shares, Vested	(120,107)
Weighted-Average Grant Date Fair Value, Vested	$ 156.00
Number of Restricted Shares, Canceled	(7,923)
Weighted-Average Grant Date Fair Value, Canceled	$ 190.57
Number of Restricted Shares, Non-vested at End of Period	489,762
Weighted-Average Grant Date Fair Value, Non-vested at End of Period	$ 198.34
Fair Value, Share-based Payment Awards, Other than Options	$ 19,455
Restricted Stock Units (RSUs)
Summary of non-vested restricted share activity:
Number of Restricted Shares, Non-vested at Beginning of Period	28,542
Number of Restricted Shares, Granted	10,431
Number of Restricted Shares, Vested	(4,868)
Number of Restricted Shares, Canceled	(98)
Number of Restricted Shares, Non-vested at End of Period	34,007
RSUs Cantel
Summary of non-vested restricted share activity:
Number of Restricted Shares, Non-vested at Beginning of Period	15,670
Weighted-Average Grant Date Fair Value, Non-vested at Beginning of Period	$ 191.18
Number of Restricted Shares, Vested	(453)
Weighted-Average Grant Date Fair Value, Vested	$ 191.18
Number of Restricted Shares, Canceled	(570)
Weighted-Average Grant Date Fair Value, Canceled	$ 191.18
Number of Restricted Shares, Non-vested at End of Period	14,647
Weighted-Average Grant Date Fair Value, Non-vested at End of Period	$ 191.18
Unrecognized compensation cost related to nonvested share-based compensation granted	$ 805