Debt Securities Available for Sale - Debt securities available- for-sale - Additional Information (Details) - USD ($)		12 Months Ended
Oct. 15, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale
Proceeds from sale of debt securities available-for-sale		$ 0	$ 235,992,000	$ 5,103,000
Available-for-sale securities transfer to Held-to-maturity		6,531,092,000	0	$ 0
Gross unrealized losses		1,759,691,000	298,348,000
US Treasury Securities
Debt Securities, Available-for-sale
Proceeds from sale of debt securities available-for-sale			236,000,000
Available-for-sale securities transfer to Held-to-maturity	$ 6,500,000,000
Available-for-sale securities transfer to Held-to-Maturity at par value	7,400,000,000
Gross unrealized losses	$ 873,000,000.0	$ 498,278,000	$ 102,059,000

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- References

No definition available.

+ Details

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- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a),(b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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