Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1,050	1,202
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 1,552,251	$ 3,846,190
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,126,485	6,381,398
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7,678,736	10,227,588
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	15,651	53,117
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	419,887	514,129
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 435,538	$ 567,246
U.S. Treasury [Member]
Debt Securities, 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, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	957	945
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	957	945
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	43	55
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 43	$ 55
Municipal securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	104	113
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 1,043	$ 1,041
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	208,223	222,432
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	209,266	223,473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5	13
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12,266	14,949
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 12,271	$ 14,962
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	696	831
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 1,398,583	$ 3,561,318
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,750,884	2,880,641
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,149,467	6,441,959
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	14,364	50,102
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	177,721	224,345
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 192,085	$ 274,447
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	34	36
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 58,785	$ 93,113
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	451,926	457,701
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	510,711	550,814
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	366	1,124
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	36,215	43,456
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 36,581	$ 44,580
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	214	220
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 93,840	$ 190,718
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,714,022	2,819,206
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,807,862	3,009,924
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	916	1,878
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	193,615	231,297
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 194,531	$ 233,175
Other debt securities [Member]
Debt Securities, 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, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	473	473
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	473	473
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, Continuous Unrealized Loss Position, Accumulated Loss	$ 27	$ 27

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