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Investment Securities - Schedule of Gross Unrealized Losses and Fair Value by Length of Time that the Individual AFS Securities Have Been in a Continuous Unrealized Loss (Details)
$ in Thousands
Dec. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 235 244
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 9,830 $ 3,084
Investment securities available-for-sale, Less than 12 months, unrealized losses (136) (4)
Investment securities available-for-sale, 12 months or greater, estimated fair value 1,256,180 1,493,993
Investment securities available-for-sale, 12 months or greater, unrealized losses (141,409) (161,952)
Investment securities available-for-sale, Estimated fair value 1,266,010 1,497,077
Investment securities available-for-sale, Unrealized losses $ (141,545) $ (161,956)
Investment securities held-to-maturity, Number of securities | security 222 228
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 5,954 $ 0
Investment securities held-to-maturity, Less than 12 months, unrealized losses (152) 0
Investment securities held-to-maturity, 12 months or greater, estimated fair value 804,394 885,977
Investment securities held-to-maturity, 12 months or greater, unrealized losses (119,419) (116,116)
Investment securities held-to-maturity, Estimated Fair Value 810,348 885,977
Investment securities held-to-maturity, Unrealized losses $ (119,571) $ (116,116)
U.S. treasury bonds    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 1 2
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses 0 0
Investment securities available-for-sale, 12 months or greater, estimated fair value 24,776 47,901
Investment securities available-for-sale, 12 months or greater, unrealized losses (212) (1,993)
Investment securities available-for-sale, Estimated fair value 24,776 47,901
Investment securities available-for-sale, Unrealized losses $ (212) $ (1,993)
U.S. agency securities    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 71 78
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 2,300 $ 3,084
Investment securities available-for-sale, Less than 12 months, unrealized losses (8) (4)
Investment securities available-for-sale, 12 months or greater, estimated fair value 556,235 668,313
Investment securities available-for-sale, 12 months or greater, unrealized losses (41,734) (57,689)
Investment securities available-for-sale, Estimated fair value 558,535 671,397
Investment securities available-for-sale, Unrealized losses $ (41,742) $ (57,693)
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 148 149
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 7,530 $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses (128) 0
Investment securities available-for-sale, 12 months or greater, estimated fair value 616,392 718,042
Investment securities available-for-sale, 12 months or greater, unrealized losses (94,407) (96,684)
Investment securities available-for-sale, Estimated fair value 623,922 718,042
Investment securities available-for-sale, Unrealized losses $ (94,535) $ (96,684)
Investment securities held-to-maturity, Number of securities | security 140 142
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities held-to-maturity, Less than 12 months, unrealized losses 0 0
Investment securities held-to-maturity, 12 months or greater, estimated fair value 519,963 590,063
Investment securities held-to-maturity, 12 months or greater, unrealized losses (85,941) (79,980)
Investment securities held-to-maturity, Estimated Fair Value 519,963 590,063
Investment securities held-to-maturity, Unrealized losses $ (85,941) $ (79,980)
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 13 13
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses 0 0
Investment securities available-for-sale, 12 months or greater, estimated fair value 48,945 49,564
Investment securities available-for-sale, 12 months or greater, unrealized losses (4,303) (4,993)
Investment securities available-for-sale, Estimated fair value 48,945 49,564
Investment securities available-for-sale, Unrealized losses $ (4,303) $ (4,993)
Investment securities held-to-maturity, Number of securities | security 16 16
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities held-to-maturity, Less than 12 months, unrealized losses 0 0
Investment securities held-to-maturity, 12 months or greater, estimated fair value 75,506 77,360
Investment securities held-to-maturity, 12 months or greater, unrealized losses (13,069) (12,867)
Investment securities held-to-maturity, Estimated Fair Value 75,506 77,360
Investment securities held-to-maturity, Unrealized losses $ (13,069) $ (12,867)
Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 1 1
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses 0 0
Investment securities available-for-sale, 12 months or greater, estimated fair value 8,014 8,490
Investment securities available-for-sale, 12 months or greater, unrealized losses (593) (293)
Investment securities available-for-sale, Estimated fair value 8,014 8,490
Investment securities available-for-sale, Unrealized losses $ (593) $ (293)
Investment securities held-to-maturity, Number of securities | security 36 40
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 4,026 $ 0
Investment securities held-to-maturity, Less than 12 months, unrealized losses (75) 0
Investment securities held-to-maturity, 12 months or greater, estimated fair value 98,645 113,031
Investment securities held-to-maturity, 12 months or greater, unrealized losses (11,314) (8,540)
Investment securities held-to-maturity, Estimated Fair Value 102,671 113,031
Investment securities held-to-maturity, Unrealized losses $ (11,389) $ (8,540)
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 1 1
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 0 $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses 0 0
Investment securities available-for-sale, 12 months or greater, estimated fair value 1,818 1,683
Investment securities available-for-sale, 12 months or greater, unrealized losses (160) (300)
Investment securities available-for-sale, Estimated fair value 1,818 1,683
Investment securities available-for-sale, Unrealized losses $ (160) $ (300)
Investment securities held-to-maturity, Number of securities | security 30 30
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 1,928 $ 0
Investment securities held-to-maturity, Less than 12 months, unrealized losses (77) 0
Investment securities held-to-maturity, 12 months or greater, estimated fair value 110,280 105,523
Investment securities held-to-maturity, 12 months or greater, unrealized losses (9,095) (14,729)
Investment securities held-to-maturity, Estimated Fair Value 112,208 105,523
Investment securities held-to-maturity, Unrealized losses $ (9,172) $ (14,729)