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Nature of Operations and Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings per Common Share (EPS) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Net income $ 123,604 $ 100,038 $ 357,216 $ 301,677
Average shares outstanding (in shares) 197,078 199,380 197,750 200,300
Effect of common stock options (in shares) 210 81 202 130
Average diluted shares outstanding (in shares) 197,288 199,461 197,952 200,430
Basic earnings per share (in dollars per share) $ 0.63 $ 0.50 $ 1.81 $ 1.51
Diluted earnings per share (in dollars per share) $ 0.63 $ 0.50 $ 1.80 $ 1.51