Investment Securities Available for Sale - Schedule Of Unrealized Loss On Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 2,523,310	$ 6,596,065
Less than 12 months, gross unrealized losses	(173,930)	(96,227)
12 months or longer, fair value	6,989,855	1,523,383
12 months or longer, gross unrealized losses	(1,423,854)	(43,377)
Total, fair value	9,513,165	8,119,448
Total, gross unrealized losses	(1,597,784)	(139,604)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	139,737	49,648
Less than 12 months, gross unrealized losses	(6,789)	(379)
12 months or longer, fair value	307,582	47,590
12 months or longer, gross unrealized losses	(37,351)	(2,248)
Total, fair value	447,319	97,238
Total, gross unrealized losses	(44,140)	(2,627)
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	28,938	21,760
Less than 12 months, gross unrealized losses	(1,053)	(387)
12 months or longer, fair value	19,603	0
12 months or longer, gross unrealized losses	(2,560)	0
Total, fair value	48,541	21,760
Total, gross unrealized losses	(3,613)	(387)
Mortgage-backed securities issued by U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	187,655	461,078
Less than 12 months, gross unrealized losses	(5,952)	(5,858)
12 months or longer, fair value	521,395	244,264
12 months or longer, gross unrealized losses	(107,516)	(5,606)
Total, fair value	709,050	705,342
Total, gross unrealized losses	(113,468)	(11,464)
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	1,473,348	5,729,476
Less than 12 months, gross unrealized losses	(120,135)	(82,671)
12 months or longer, fair value	5,365,233	643,758
12 months or longer, gross unrealized losses	(1,130,105)	(19,409)
Total, fair value	6,838,581	6,373,234
Total, gross unrealized losses	(1,250,240)	(102,080)
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	119,649	187,431
Less than 12 months, gross unrealized losses	(10,311)	(3,981)
12 months or longer, fair value	535,478	504,238
12 months or longer, gross unrealized losses	(104,060)	(12,745)
Total, fair value	655,127	691,669
Total, gross unrealized losses	(114,371)	(16,726)
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	565,382	146,672
Less than 12 months, gross unrealized losses	(29,383)	(2,951)
12 months or longer, fair value	240,564	83,533
12 months or longer, gross unrealized losses	(42,262)	(3,369)
Total, fair value	805,946	230,205
Total, gross unrealized losses	(71,645)	$ (6,320)
Corporate debt securities and other debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	8,601
Less than 12 months, gross unrealized losses	(307)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	8,601
Total, gross unrealized losses	$ (307)