Securities Available for sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1,123	1,153
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 1,205,822	$ 6,173,710
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	8,087,455	3,829,168
Available for sale securities, Unrealized Loss Position, Fair Value	9,293,277	10,002,878
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7,969	376,598
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	661,476	517,616
Available for sale securities, Unrealized Loss Position, Accumulated Loss	669,445	$ 894,214
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0
U.S. Treasury [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 0	$ 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	925	899
Available for sale securities, Unrealized Loss Position, Fair Value	925	899
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	75	102
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 75	$ 102
Municipal securities [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	190	227
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 6,799	$ 146,634
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	494,955	428,248
Available for sale securities, Unrealized Loss Position, Fair Value	501,754	574,882
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	410	5,301
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	41,465	58,395
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 41,875	$ 63,696
Residential agency mortgage-backed securities [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	630	613
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 690,118	$ 3,879,582
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	3,717,975	863,732
Available for sale securities, Unrealized Loss Position, Fair Value	4,408,093	4,743,314
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3,689	256,973
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	265,219	102,974
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 268,908	$ 359,947
Residential non-agency mortgage-backed securities [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	32	26
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 116,077	$ 499,716
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	451,370	0
Available for sale securities, Unrealized Loss Position, Fair Value	567,447	499,716
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,244	50,623
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	45,279	0
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 46,523	$ 50,623
Commercial agency mortgage-backed securities [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	269	285
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 392,828	$ 1,647,778
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	3,421,757	2,535,816
Available for sale securities, Unrealized Loss Position, Fair Value	3,814,585	4,183,594
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,626	63,701
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	309,411	356,118
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 312,037	$ 419,819
Other debt securities [Member]
Available for sale, Unrealized Loss Position [Line Items]
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 0	$ 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	473	473
Available for sale securities, Unrealized Loss Position, Fair Value	473	473
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	27	27
Available for sale securities, Unrealized Loss Position, Accumulated Loss	$ 27	$ 27