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Earnings per Share (EPS)
 3 Months Ended
Mar. 31, 2024
Earnings Per Share [Abstract]  
Earnings per Share (EPS) Earnings per Share (EPS)
 
The following table reconciles the net income and the weighted average common shares outstanding used in the computations of basic and diluted earnings per common share:
 
Three Months Ended 
March 31,
(In thousands, except per share amounts)20242023
Net income$181,719 $170,827 
Basic weighted average shares outstanding105,697 106,943 
Dilutive effect of nonvested shares1,073 642 
Diluted weighted average shares outstanding106,770 107,585 
Basic earnings per share$1.72 $1.60 
Diluted earnings per share$1.70 $1.59 
 
There were 167,730 and 111,870 antidilutive shares for the three months ended March 31, 2024 and 2023, respectively.
 
Nonvested performance-based share awards are considered contingently issuable for purposes of the EPS calculation. The 2024, 2023, and 2022 performance-based share awards vest based upon our compounded annual book value per share growth percentage and relative total shareholder return during a three-year performance period. The following table summarizes the performance-based shares issuable if the reporting date was the end of the contingency period.

2024 Performance-Based Grants2023 Performance-Based Grants2022 Performance-Based Grants2021 Performance-Based Grants
Reporting DatePercent Issuable Relative to TargetAs a Percent of Shares IssuedPercent Issuable Relative to TargetAs a Percent of Shares IssuedPercent Issuable Relative to TargetAs a Percent of Shares IssuedPercent Issuable Relative to TargetAs a Percent of Shares Issued
March 31, 2024179%89.5%200%100%200%100%(1)(1)
March 31, 2023200%100%170%85%100%50%
(1) The 2021 performance based awards vested at 133% relative to target on March 1, 2024.