Deposits - total deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Deposits [Abstract]
Savings accounts	$ 15,305,838	$ 14,746,329
NOW, money market and other interest bearing demand deposits	24,622,430	23,738,940
Total savings, NOW, money market and other interest bearing demand deposits	39,928,268	38,485,269
Certificates of deposit:
Under $250,000	5,263,696	4,235,651
$250,000 and over	2,944,262	2,545,750
Total certificates of deposit	8,207,958	6,781,401
Total interest bearing deposits	48,136,226	45,266,670
Noninterest Bearing Deposit Liabilities	15,201,374	15,960,557
Total deposits	$ 63,337,600	$ 61,227,227

Deposits, Savings, Negotiable Order of Withdrawal (NOW), Money Market Account and Other Demand Deposits

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- Definition

Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more.

+ References

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Amount of time deposit liabilities, including certificates of deposit, in denominations of less than $250,000.

+ References

No definition available.

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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- Definition

Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. Also includes amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written.

+ References

No definition available.

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Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).

+ References

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The aggregate of all domestic and foreign interest-bearing deposit liabilities.

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The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.

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- Definition

Amount of time deposit liabilities, including certificates of deposit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818

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-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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