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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
Mar. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 233 235
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 7,398 $ 9,830
Investment securities available-for-sale, Less than 12 months, unrealized losses (39) (136)
Investment securities available-for-sale, 12 months or greater, estimated fair value 1,205,565 1,256,180
Investment securities available-for-sale, 12 months or greater, unrealized losses (115,836) (141,409)
Investment securities available-for-sale, Estimated fair value 1,212,963 1,266,010
Investment securities available-for-sale, Unrealized losses $ (115,875) $ (141,545)
Investment securities held-to-maturity, Number of securities | security 219 222
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 1,935 $ 5,954
Investment securities held-to-maturity, Less than 12 months, unrealized losses (70) (152)
Investment securities held-to-maturity, 12 months or greater, estimated fair value 807,566 804,394
Investment securities held-to-maturity, 12 months or greater, unrealized losses (105,148) (119,419)
Investment securities held-to-maturity, Estimated Fair Value 809,501 810,348
Investment securities held-to-maturity, Unrealized losses $ (105,218) $ (119,571)
U.S. treasury bonds    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security   1
Investment securities available-for-sale, Less than 12 months, estimated fair value   $ 0
Investment securities available-for-sale, Less than 12 months, unrealized losses   0
Investment securities available-for-sale, 12 months or greater, estimated fair value   24,776
Investment securities available-for-sale, 12 months or greater, unrealized losses   (212)
Investment securities available-for-sale, Estimated fair value   24,776
Investment securities available-for-sale, Unrealized losses   $ (212)
U.S. agency securities    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 70 71
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 0 $ 2,300
Investment securities available-for-sale, Less than 12 months, unrealized losses 0 (8)
Investment securities available-for-sale, 12 months or greater, estimated fair value 537,909 556,235
Investment securities available-for-sale, 12 months or greater, unrealized losses (33,079) (41,734)
Investment securities available-for-sale, Estimated fair value 537,909 558,535
Investment securities available-for-sale, Unrealized losses $ (33,079) $ (41,742)
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Investment securities available-for-sale, Number of securities | security 148 148
Investment securities available-for-sale, Less than 12 months, estimated fair value $ 7,398 $ 7,530
Investment securities available-for-sale, Less than 12 months, unrealized losses (39) (128)
Investment securities available-for-sale, 12 months or greater, estimated fair value 608,722 616,392
Investment securities available-for-sale, 12 months or greater, unrealized losses (78,334) (94,407)
Investment securities available-for-sale, Estimated fair value 616,120 623,922
Investment securities available-for-sale, Unrealized losses $ (78,373) $ (94,535)
Investment securities held-to-maturity, Number of securities | security 138 140
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 517,134 519,963
Investment securities held-to-maturity, 12 months or greater, unrealized losses (74,975) (85,941)
Investment securities held-to-maturity, Estimated Fair Value 517,134 519,963
Investment securities held-to-maturity, Unrealized losses $ (74,975) $ (85,941)
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 49,206 48,945
Investment securities available-for-sale, 12 months or greater, unrealized losses (3,589) (4,303)
Investment securities available-for-sale, Estimated fair value 49,206 48,945
Investment securities available-for-sale, Unrealized losses $ (3,589) $ (4,303)
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 76,712 75,506
Investment securities held-to-maturity, 12 months or greater, unrealized losses (11,485) (13,069)
Investment securities held-to-maturity, Estimated Fair Value 76,712 75,506
Investment securities held-to-maturity, Unrealized losses $ (11,485) $ (13,069)
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 7,888 8,014
Investment securities available-for-sale, 12 months or greater, unrealized losses (674) (593)
Investment securities available-for-sale, Estimated fair value 7,888 8,014
Investment securities available-for-sale, Unrealized losses $ (674) $ (593)
Investment securities held-to-maturity, Number of securities | security 35 36
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 0 $ 4,026
Investment securities held-to-maturity, Less than 12 months, unrealized losses 0 (75)
Investment securities held-to-maturity, 12 months or greater, estimated fair value 102,122 98,645
Investment securities held-to-maturity, 12 months or greater, unrealized losses (10,879) (11,314)
Investment securities held-to-maturity, Estimated Fair Value 102,122 102,671
Investment securities held-to-maturity, Unrealized losses $ (10,879) $ (11,389)
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 1,840 1,818
Investment securities available-for-sale, 12 months or greater, unrealized losses (160) (160)
Investment securities available-for-sale, Estimated fair value 1,840 1,818
Investment securities available-for-sale, Unrealized losses $ (160) $ (160)
Investment securities held-to-maturity, Number of securities | security 30 30
Investment securities held-to-maturity, Less than 12 months, estimated fair value $ 1,935 $ 1,928
Investment securities held-to-maturity, Less than 12 months, unrealized losses (70) (77)
Investment securities held-to-maturity, 12 months or greater, estimated fair value 111,598 110,280
Investment securities held-to-maturity, 12 months or greater, unrealized losses (7,809) (9,095)
Investment securities held-to-maturity, Estimated Fair Value 113,533 112,208
Investment securities held-to-maturity, Unrealized losses $ (7,879) $ (9,172)