Debt Securities Available for Sale - Weighted average yield and contractual maturities of debt securities AFS (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized cost
Amortized cost - Within 1 year	$ 10,556,673
Amortized cost - After 1 to 5 years	2,639,766
Amortized cost - After 5 to 10 years	748,840
Amortized cost - After 10 years	5,572,616
Amortized Cost	19,517,895	$ 18,101,163
Gross unrealized gains
Gross unrealized gains	1,992	1,394
Gross unrealized loss
Gross unrealized losses	1,273,984	1,373,513
Fair Value
Fair value - Within 1 year	10,511,675
Fair value - After 1 to 5 years	2,573,499
Fair value - After 5 to 10 years	702,940
Fair value - After 10 years	4,457,789
Debt securities available-for-sale	$ 18,245,903	$ 16,729,044
Weighted average yield
Weighted Average Yield	2.78%	2.35%
US Treasury Securities
Amortized cost
Amortized cost - Within 1 year	$ 10,555,397	$ 7,103,518
Amortized cost - After 1 to 5 years	2,547,936	3,598,209
Amortized cost - After 5 to 10 years		307,512
Amortized Cost	13,103,333	11,009,239
Gross unrealized gains
Gross unrealized gain - Within 1 year	1,282	526
Gross unrealized gain - After 1 to 5 years	151	84
Gross unrealized gain - After 5 to 10 years		0
Gross unrealized gains	1,433	610
Gross unrealized loss
Gross unrealized losses - Within 1 year	46,275	59,415
Gross unrealized losses - After 1 to 5 years	63,381	170,209
Gross unrealized losses - After 5 to 10 years		33,164
Gross unrealized losses	109,656	262,788
Fair Value
Fair value - Within 1 year	10,510,404	7,044,629
Fair value - After 1 to 5 years	2,484,706	3,428,084
Fair value - After 5 to 10 years		274,348
Debt securities available-for-sale	$ 12,995,110	$ 10,747,061
Weighted average yield
Weighted average yield - Within 1 year	3.33%	3.51%
Weighted average yield - After 1 to 5 years	3.07%	1.35%
Weighted average yield - After 5 to 10 years		1.63%
Weighted Average Yield	3.28%	2.75%
Collateralized Mortgage Obligations - Federal agencies
Amortized cost
Amortized cost - After 1 to 5 years	$ 10,538	$ 17,899
Amortized cost - After 5 to 10 years	15,334	20,503
Amortized cost - After 10 years	104,168	108,280
Amortized Cost	130,040	146,682
Gross unrealized gains
Gross unrealized gain - After 1 to 5 years	0	0
Gross unrealized gain - After 5 to 10 years	0	2
Gross unrealized gain - After 10 years	132	29
Gross unrealized gains	132	31
Gross unrealized loss
Gross unrealized losses - After 1 to 5 years	345	838
Gross unrealized losses - After 5 to 10 years	904	1,321
Gross unrealized losses - After 10 years	8,639	9,868
Gross unrealized losses	9,888	12,027
Fair Value
Fair value - After 1 to 5 years	10,193	17,061
Fair value - After 5 to 10 years	14,430	19,184
Fair value - After 10 years	95,661	98,441
Debt securities available-for-sale	$ 120,284	$ 134,686
Weighted average yield
Weighted average yield - After 1 to 5 years	1.53%	1.55%
Weighted average yield - After 5 to 10 years	2.24%	2.28%
Weighted average yield - After 10 years	2.76%	2.54%
Weighted Average Yield	2.60%	2.38%
Mortgge Backed Securities - Federal agencies
Amortized cost
Amortized cost - Within 1 year	$ 776	$ 637
Amortized cost - After 1 to 5 years	79,542	82,310
Amortized cost - After 5 to 10 years	733,506	792,431
Amortized cost - After 10 years	5,468,448	6,067,353
Amortized Cost	6,282,272	6,942,731
Gross unrealized gains
Gross unrealized gain - Within 1 year	0	0
Gross unrealized gain - After 1 to 5 years	8	11
Gross unrealized gain - After 5 to 10 years	82	75
Gross unrealized gain - After 10 years	337	667
Gross unrealized gains	427	753
Gross unrealized loss
Gross unrealized losses - Within 1 year	5	3
Gross unrealized losses - After 1 to 5 years	2,700	3,536
Gross unrealized losses - After 5 to 10 years	45,078	48,250
Gross unrealized losses - After 10 years	1,106,657	1,046,909
Gross unrealized losses	1,154,440	1,098,698
Fair Value
Fair value - Within 1 year	771	634
Fair value - After 1 to 5 years	76,850	78,785
Fair value - After 5 to 10 years	688,510	744,256
Fair value - After 10 years	4,362,128	5,021,111
Debt securities available-for-sale	$ 5,128,259	$ 5,844,786
Weighted average yield
Weighted average yield - Within 1 year	1.65%	3.72%
Weighted average yield - After 1 to 5 years	2.35%	2.34%
Weighted average yield - After 5 to 10 years	2.37%	2.28%
Weighted average yield - After 10 years	1.67%	1.64%
Weighted Average Yield	1.75%	1.72%
Other
Amortized cost
Amortized cost - Within 1 year	$ 500	$ 1,011
Amortized cost - After 1 to 5 years	1,750	1,500
Amortized Cost	2,250	2,511
Gross unrealized gains
Gross unrealized gain - Within 1 year	0	0
Gross unrealized gain - After 1 to 5 years	0	0
Gross unrealized gains	0	0
Gross unrealized loss
Gross unrealized losses - Within 1 year	0	0
Gross unrealized losses - After 1 to 5 years	0	0
Gross unrealized losses	0	0
Fair Value
Fair value - Within 1 year	500	1,011
Fair value - After 1 to 5 years	1,750	1,500
Debt securities available-for-sale	$ 2,250	$ 2,511
Weighted average yield
Weighted average yield - Within 1 year	5.00%	4.00%
Weighted average yield - After 1 to 5 years	5.50%	8.50%
Weighted Average Yield	5.39%	6.69%

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Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1403
-Paragraph a
-Subparagraph (1)
-Publisher SEC

+ Details

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- Details

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- Details

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