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Other Comprehensive (Loss) Income - Activity in Accumulated Other Comprehensive Loss Associated with Securities Available for Sale, Net of Tax (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
BALANCE $ 7,599,736 $ 7,283,444 $ 7,438,495 $ 7,079,330
Beginning balance, accumulated other comprehensive income     (1,624) (1,398)
Other comprehensive income (loss) (261) 741 54 553
Ending balance, accumulated other comprehensive income (1,570) (845) (1,570) (845)
BALANCE 7,664,938 7,361,249 7,664,938 7,361,249
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]        
BALANCE     (1,624) (1,398)
Other comprehensive income (loss)     54 553
BALANCE $ (1,570) $ (845) $ (1,570) $ (845)