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	Dec. 31, 2021 USD ($) Security	Dec. 31, 2020 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	104	37
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 880,643	$ 170,971
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(18,857)	(1,016)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	82,459	5,424
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(3,575)	(33)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	963,102	176,395
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (22,432)	$ (1,049)
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	10	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 64,585	$ 30,639
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,590)	(137)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	19,223	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(777)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	83,808	30,639
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (2,367)	$ (137)
USTreasuryNotesSecurities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 9,946
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(8)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	9,946
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (8)
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	3	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 9,507	$ 210
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(56)	(85)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	9,507	210
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (56)	$ (85)
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	51	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 612,280	$ 45,253
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(13,894)	(198)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	25,412	472
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(1,121)	(7)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	637,692	45,725
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (15,015)	$ (205)
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	14	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 96,372	$ 3,963
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,257)	(5)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	761	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(10)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	97,133	3,963
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,267)	$ (5)
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	19	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 64,473	$ 55,554
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,994)	(390)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	37,063	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(1,667)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	101,536	55,554
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (3,661)	$ (390)
Asset-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	3	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 15,978	$ 24,436
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(4)	(99)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	4,952
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0	(26)
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	15,978	29,388
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (4)	$ (125)
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Number of Securities | Security	3	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 7,502	$ 10,916
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(54)	(102)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value	7,502	10,916
Available-for-sale Securities, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (54)	$ (102)