Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Jun. 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	536	120
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (147,433)	$ (34,586)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 2,183,889	$ 2,955,152
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	26	17
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (28,791)	$ (920)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	322,556	66,478
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(176,224)	(35,506)
Debt Securities, Available-for-sale, Unrealized Loss Position	2,506,446	3,021,630
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(462,387)	(8,422)
Fair value of unrealized losses on held to maturity securities, less than 12 months	3,027,647	533,577
Unrealized losses on held to maturity securities, 12 months or more	(17,163)	(387)
Fair value of unrealized losses on held to maturity securities, 12 months or more	80,222	10,775
Total unrealized losses on held to maturity securities	(479,551)	(8,809)
Total fair value of unrealized losses on held to maturity securities	$ 3,107,869	$ 544,352
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	939	72
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	16	1
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	5	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (10,141)	$ (1,334)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 104,289	$ 122,957
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,115)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	8,820	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(11,256)	(1,334)
Debt Securities, Available-for-sale, Unrealized Loss Position	113,109	$ 122,957
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(44)
Fair value of unrealized losses on held to maturity securities, less than 12 months	955
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	(44)
Total fair value of unrealized losses on held to maturity securities	$ 955
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
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
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	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,041)	$ (103)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,959	$ 14,897
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	(1,041)	(103)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 13,959	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	373
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (3,518)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 224,804
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	(3,518)
Debt Securities, Available-for-sale, Unrealized Loss Position	224,804
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(156,757)	(1,951)
Fair value of unrealized losses on held to maturity securities, less than 12 months	1,127,009	112,038
Unrealized losses on held to maturity securities, 12 months or more	(4,359)	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	11,242	0
Total unrealized losses on held to maturity securities	(161,116)	(1,951)
Total fair value of unrealized losses on held to maturity securities	$ 1,138,251	$ 112,038
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	717	49
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	9	0
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	$ (54,490)
Fair value of unrealized losses on held to maturity securities, less than 12 months	333,841
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	(54,490)
Total fair value of unrealized losses on held to maturity securities	$ 333,841
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	18
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	0
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	6	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (2,905)	$ (256)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 72,610	$ 64,282
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	9	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4,187)	$ (867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	88,655	62,576
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(7,092)	(1,123)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 161,264	$ 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	0	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	$ 0	$ 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	2,456	3,902
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(45)	(54)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,456	$ 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	3	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (71)	$ (6)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 2,929	$ 2,994
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	(71)	(6)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,929	$ 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	95	74
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (125,142)	$ (21,249)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,554,774	$ 2,172,837
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	8	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (23,443)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	222,626	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(148,585)	(21,249)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,777,400	$ 2,172,837
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(125,444)
Fair value of unrealized losses on held to maturity securities, less than 12 months	872,561
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	(125,444)
Total fair value of unrealized losses on held to maturity securities	$ 872,561
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	81
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	0
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	$ (601)	$ (9,302)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 18,606	$ 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	(601)	(9,302)
Debt Securities, Available-for-sale, Unrealized Loss Position	18,606	328,568
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(119,046)	(6,272)
Fair value of unrealized losses on held to maturity securities, less than 12 months	313,359	388,072
Unrealized losses on held to maturity securities, 12 months or more	(12,804)	(387)
Fair value of unrealized losses on held to maturity securities, 12 months or more	68,980	10,775
Total unrealized losses on held to maturity securities	(131,851)	(6,659)
Total fair value of unrealized losses on held to maturity securities	$ 382,339	$ 398,847
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	15	18
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	7	1
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	$ (1,542)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 86,238
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	(1,542)
Debt Securities, Available-for-sale, Unrealized Loss Position	86,238
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(1,637)
Fair value of unrealized losses on held to maturity securities, less than 12 months	40,113
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	(1,637)
Total fair value of unrealized losses on held to maturity securities	$ 40,113
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	74
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] | 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	35
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (2,473)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 105,680
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	(2,473)
Debt Securities, Available-for-sale, Unrealized Loss Position	105,680
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(4,970)	$ (200)
Fair value of unrealized losses on held to maturity securities, less than 12 months	339,810	33,468
Unrealized losses on held to maturity securities, 12 months or more	0	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	0	0
Total unrealized losses on held to maturity securities	(4,970)	(200)
Total fair value of unrealized losses on held to maturity securities	$ 339,810	$ 33,468
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	33	5
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	0	0