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Share-Based Compensation and Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Summary Of Share Incentive Plans
A summary of activity under our share incentive plans for the year ended December 31, 2022 is shown below:
Nonvested
Share
Awards
Outstanding		Weighted
Average
Exercise /
Grant Price
Nonvested share awards outstanding at December 31, 2021184,128 $107.57 
Granted136,948 161.91 
Exercised/Vested(151,361)128.45 
Forfeited(5,068)129.96 
Total nonvested share awards outstanding at December 31, 2022164,647 $132.99 
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] The following table presents information related to our ESPP:
202220212020
Shares purchased15,353 29,857 22,496 
Weighted average fair value of shares purchased$119.15 $141.64 $95.97 
Expense recorded (in millions)$0.2 $1.2 $0.3 
Temporary Equity [Table Text Block]