v3.26.1
Comprehensive Income - Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Available for sale ("AFS") securities:            
Net reclassification adjustment for losses included in net income $ (9,728)   $ 0   $ (9,728) $ 0
Income before income taxes 164,142   152,088   320,130 259,021
Related income tax effect (32,765)   (31,367)   (64,553) (53,994)
Net income (loss) 131,377 $ 124,200 120,721 $ 84,306 255,577 205,027
Cash flow hedge:            
Income before income taxes 164,142   152,088   320,130 259,021
Related income tax effect (32,765)   (31,367)   (64,553) (53,994)
Net income (loss) $ 131,377 $ 124,200 $ 120,721 $ 84,306 255,577 $ 205,027
Reclassification out of Accumulated Other Comprehensive Income [Member]            
Available for sale ("AFS") securities:            
Net income (loss)         4,332  
Cash flow hedge:            
Net income (loss)         4,332  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains/Losses on AFS Securities [Member]            
Available for sale ("AFS") securities:            
Net reclassification adjustment for losses included in net income         9,728  
Income before income taxes         9,728  
Related income tax effect         (2,325)  
Net income (loss)         7,403  
Cash flow hedge:            
Income before income taxes         9,728  
Related income tax effect         (2,325)  
Net income (loss)         7,403  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]            
Available for sale ("AFS") securities:            
Income before income taxes         (4,035)  
Related income tax effect         964  
Net income (loss)         (3,071)  
Cash flow hedge:            
Net reclassification adjustment for gains included in net income         (4,035)  
Income before income taxes         (4,035)  
Related income tax effect         964  
Net income (loss)         $ (3,071)