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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of Shares Granted
During the six months ended June 30, 2023 and 2022, shares were granted as follows:

Grant PeriodTypePlanShares GrantedGrant Date Fair Value Per ShareVesting Type
2023Key Employees2015 Equity Incentive Plan220,558 $137.15 
(1)
Time Based
2023Executive Officers2015 Equity Incentive Plan62,800 $144.88 
(1)
Time Based
2023Executive Officers2015 Equity Incentive Plan82,200 $108.60 
(2)
Market Condition
(3)
2023Directors2004 Non-Employee Director Option Plan16,000 $148.12 
(1)
Time Based
2022Key Employees2015 Equity Incentive Plan194,260 $180.33 
(1)
Time Based
2022Executive Officers2015 Equity Incentive Plan66,000 $178.20 
(1)
Time Based
2022Executive Officers2015 Equity Incentive Plan91,500 $124.88 
(2)
Market Condition
(3)
2022Directors2004 Non-Employee Director Option Plan11,900 $197.00 
(1)
Time Based
(1)Represents the weighted average fair value per share of the closing price of our common stock on the dates the shares were awarded.
(2)Represents the weighted average fair value per share of the Monte Carlo simulation fair value price of our market condition awards on the dates the shares were awarded.
(3)Share-based compensation for restricted stock awards with market conditions is measured based on shares expected to vest using a Monte Carlo simulation to determine fair value.
Schedule of Share-based Compensation Costs We recognized the following share-based compensation costs (in millions):
Three Months EndedSix Months Ended
June 30, 2023June 30, 2022June 30, 2023June 30, 2022
Share-based compensation - expensed(1)
$9.9 $9.2 $19.5 $18.9 
Share-based compensation - capitalized(2)
$0.6 $— $1.3 $— 
(1) Recorded within General and Administrative Expense on the Consolidated Income Statements.
(2) Capitalized to Land Improvements and Buildings on the Consolidated Balance Sheets.