Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	736	120
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (138,010)	$ (34,586)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,431,302	$ 2,955,152
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	65	17
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (137,533)	$ (920)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,014,983	66,478
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(275,542)	(35,506)
Debt Securities, Available-for-sale, Unrealized Loss Position	2,446,286	3,021,630
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(494,950)	(8,422)
Fair value of unrealized losses on held to maturity securities, less than 12 months	2,420,301	533,577
Unrealized losses on held to maturity securities, 12 months or more	(222,632)	(387)
Fair value of unrealized losses on held to maturity securities, 12 months or more	813,874	10,775
Total unrealized losses on held to maturity securities	(717,582)	(8,809)
Total fair value of unrealized losses on held to maturity securities	$ 3,234,175	$ 544,352
Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	73	1
Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	1,331	72
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (651)	$ (1,334)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,293	$ 122,957
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	6	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (15,468)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	103,991	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(16,119)	(1,334)
Debt Securities, Available-for-sale, Unrealized Loss Position	108,284	$ 122,957
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(66)
Fair value of unrealized losses on held to maturity securities, less than 12 months	932
Unrealized losses on held to maturity securities, 12 months or more	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	0
Total unrealized losses on held to maturity securities	(66)
Total fair value of unrealized losses on held to maturity securities	$ 932
US Treasury Securities | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	0
US Treasury Securities | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	1
Agency Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (103)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 14,897
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,601)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,399	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,601)	(103)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 13,399	14,897
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	605
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (15,669)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 328,806
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(15,669)
Debt Securities, Available-for-sale, Unrealized Loss Position	328,806
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(244,555)	(1,951)
Fair value of unrealized losses on held to maturity securities, less than 12 months	1,350,294	112,038
Unrealized losses on held to maturity securities, 12 months or more	(27,805)	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	53,371	0
Total unrealized losses on held to maturity securities	(272,360)	(1,951)
Total fair value of unrealized losses on held to maturity securities	$ 1,403,665	$ 112,038
US States and Political Subdivisions Debt Securities [Member] | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	29	0
US States and Political Subdivisions Debt Securities [Member] | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	1,123	49
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security		12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ (2,335)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 248,617
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		(2,335)
Debt Securities, Available-for-sale, Unrealized Loss Position		$ 248,617
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	$ (59,733)
Fair value of unrealized losses on held to maturity securities, less than 12 months	252,382
Unrealized losses on held to maturity securities, 12 months or more	(15,173)
Fair value of unrealized losses on held to maturity securities, 12 months or more	54,590
Total unrealized losses on held to maturity securities	(74,906)
Total fair value of unrealized losses on held to maturity securities	$ 306,972
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	2
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	16
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	5	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,735)	$ (256)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 66,349	$ 64,282
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	10	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3,022)	$ (867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	92,207	62,576
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,757)	(1,123)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 158,556	$ 126,858
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 350	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	7	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (45)	$ (54)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,218	3,902
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(45)	(54)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,569	$ 3,902
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	2	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (21)	$ (6)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,979	$ 2,994
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (46)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	954	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(67)	(6)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,933	$ 2,994
FNMA/FHLMC | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	68	74
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (109,670)	$ (21,249)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 827,116	$ 2,172,837
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	40	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (117,350)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	802,215	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(227,020)	(21,249)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,629,330	$ 2,172,837
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(105,032)
Fair value of unrealized losses on held to maturity securities, less than 12 months	496,903
Unrealized losses on held to maturity securities, 12 months or more	(77,377)
Fair value of unrealized losses on held to maturity securities, 12 months or more	314,998
Total unrealized losses on held to maturity securities	(182,409)
Total fair value of unrealized losses on held to maturity securities	$ 811,900
FNMA/FHLMC | Residential Related Securities | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	11
FNMA/FHLMC | Residential Related Securities | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	87
FNMA/FHLMC | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,837)	$ (9,302)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 17,286	$ 328,568
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,837)	(9,302)
Debt Securities, Available-for-sale, Unrealized Loss Position	17,286	328,568
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(76,439)	(6,272)
Fair value of unrealized losses on held to maturity securities, less than 12 months	221,584	388,072
Unrealized losses on held to maturity securities, 12 months or more	(100,382)	(387)
Fair value of unrealized losses on held to maturity securities, 12 months or more	380,012	10,775
Total unrealized losses on held to maturity securities	(176,822)	(6,659)
Total fair value of unrealized losses on held to maturity securities	$ 601,596	$ 398,847
FNMA/FHLMC | Commercial mortgage-related securities | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	30	1
FNMA/FHLMC | Commercial mortgage-related securities | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	13	18
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	17
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (4,234)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 78,029
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,234)
Debt Securities, Available-for-sale, Unrealized Loss Position	78,029
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(3,872)
Fair value of unrealized losses on held to maturity securities, less than 12 months	39,323
Unrealized losses on held to maturity securities, 12 months or more	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	0
Total unrealized losses on held to maturity securities	(3,872)
Total fair value of unrealized losses on held to maturity securities	$ 39,323
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	0
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	78
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (4,192)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 107,094
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,192)
Debt Securities, Available-for-sale, Unrealized Loss Position	107,094
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(5,252)	$ (200)
Fair value of unrealized losses on held to maturity securities, less than 12 months	58,883	33,468
Unrealized losses on held to maturity securities, 12 months or more	(1,895)	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	10,904	0
Total unrealized losses on held to maturity securities	(7,147)	(200)
Total fair value of unrealized losses on held to maturity securities	$ 69,787	$ 33,468
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities | Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	1	0
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities | Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	13	5