Securities - Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale (Details) $ in Thousands	Sep. 30, 2024 USD ($) Security	Dec. 31, 2023 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	267	283
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 65,631	$ 33,553
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(406)	(1,735)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,009,067	1,046,104
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(143,393)	(177,329)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	1,074,698	1,079,657
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (143,799)	$ (179,064)
Held to maturity securities continuous unrealized loss position number of positions | Security	1	2
Held-to-maturity Securities, Fair Value	$ 603	$ 1,149
Held-to-maturity Securities, Gross Unrealized Losses	(2)	(8)
Less than 12 Months
Schedule Of Available For Sale Securities [Line Items]
Held-to-maturity Securities, Fair Value	0	0
Held-to-maturity Securities, Gross Unrealized Losses	0	0
12 Months or Longer
Schedule Of Available For Sale Securities [Line Items]
Held-to-maturity Securities, Fair Value	603	1,149
Held-to-maturity Securities, Gross Unrealized Losses	$ (2)	$ (8)
U.S. treasury notes
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	6	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 0	$ 5,018
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	0	(4)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	32,646	31,843
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(291)	(1,021)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	32,646	36,861
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (291)	$ (1,025)
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	17	18
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 0	$ 535
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	0	(9)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	122,805	119,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(12,782)	(16,395)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	122,805	119,644
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (12,782)	$ (16,404)
Obligations of States, Municipalities, and Political Subdivisions
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	53	61
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 2,677	$ 12,267
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(6)	(156)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	52,003	49,617
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(3,428)	(3,987)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	54,680	61,884
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (3,434)	$ (4,143)
Held to maturity securities continuous unrealized loss position number of positions | Security	1	2
Held-to-maturity Securities, Fair Value	$ 603	$ 1,149
Held-to-maturity Securities, Gross Unrealized Losses	(2)	(8)
Obligations of States, Municipalities, and Political Subdivisions | Less than 12 Months
Schedule Of Available For Sale Securities [Line Items]
Held-to-maturity Securities, Fair Value	0	0
Held-to-maturity Securities, Gross Unrealized Losses	0	0
Obligations of States, Municipalities, and Political Subdivisions | 12 Months or Longer
Schedule Of Available For Sale Securities [Line Items]
Held-to-maturity Securities, Fair Value	603	1,149
Held-to-maturity Securities, Gross Unrealized Losses	$ (2)	$ (8)
Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	101	102
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 20,016	$ 8,332
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(146)	(49)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	516,354	543,648
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(78,215)	(95,365)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	536,370	551,980
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (78,361)	$ (95,414)
Non-Agency, Residential Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	20	20
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 18,406	$ 636
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(79)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	96,546	99,624
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(18,077)	(22,099)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	114,952	100,260
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (18,156)	$ (22,099)
Agency, Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	49	48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 23,077	$ 6,765
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(138)	(1,517)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	147,021	140,439
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(27,127)	(32,731)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	170,098	147,204
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (27,265)	$ (34,248)
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	20	21
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 1,455	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(37)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	35,619	36,171
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(2,526)	(4,510)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	37,074	36,171
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (2,563)	$ (4,510)
Asset-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	1	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	6,073	25,653
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(947)	(1,221)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	6,073	25,653
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (947)	$ (1,221)