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Securities Securities - Unrealized Losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 2,724,439 $ 1,021,511
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 28,284 14,349
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,619,124 2,243,962
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 193,330 243,875
Debt Securities, Available-for-sale, Unrealized Loss Position 4,343,563 3,265,473
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 221,614 258,224
US Treasury Securities    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 1,123,453 693,621
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12,223 11,651
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 177,930 192,500
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 2,054 2,929
Debt Securities, Available-for-sale, Unrealized Loss Position 1,301,383 886,121
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 14,277 14,580
U.S. Government Agency Securities    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 2,347 14,989
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 18 11
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 210,127 247,648
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 24,554 21,866
Debt Securities, Available-for-sale, Unrealized Loss Position 212,474 262,637
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 24,572 21,877
Mortgage-backed Agency Securities    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 990,956 72,907
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 9,211 1,518
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 607,659 828,251
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 98,356 123,499
Debt Securities, Available-for-sale, Unrealized Loss Position 1,598,615 901,158
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 107,567 125,017
State and Municipal Securities    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 446,241 185,108
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 5,590 908
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 348,807 449,212
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 41,145 44,200
Debt Securities, Available-for-sale, Unrealized Loss Position 795,048 634,320
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 46,735 45,108
Asset-backed Securities    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 30,369 42,207
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 27 254
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0 122,469
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 10,026
Debt Securities, Available-for-sale, Unrealized Loss Position 30,369 164,676
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 27 10,280
Corporate Notes    
Investment securities, continuous unrealized loss position [Abstract]    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 131,073 12,679
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 1,215 7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 274,601 403,882
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 27,221 41,355
Debt Securities, Available-for-sale, Unrealized Loss Position 405,674 416,561
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss $ 28,436 $ 41,362