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Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share Calculations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Basic net income per common share calculation:        
Net income available to common shareholders $ 142,893 $ 128,805 $ 312,403 $ 455,779
Denominator - Weighted average common shares outstanding (in shares) 76,520,599 76,044,182 76,435,370 75,998,965
Basic net income per common share (in dollars per share) $ 1.87 $ 1.69 $ 4.09 $ 6.00
Diluted net income per common share calculation:        
Numerator - Net income available to common shareholders $ 142,893 $ 128,805 $ 312,403 $ 455,779
Dilutive shares contingently issuable (in shares) 245,000 158,000 171,000 104,000
Weighted Average Number of Shares Outstanding, Diluted 76,765,586 76,201,916 76,606,329 76,102,622
Diluted net income per common share (in dollars per share) $ 1.86 $ 1.69 $ 4.08 $ 5.99