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FEDERAL HOME LOAN BANK ADVANCES, FEDERAL RESERVE BANK BORROWINGS AND OTHER BORROWINGS - Additional Information (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) bank | Dec. 31, 2022 USD ($) bank
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Investment in capital stock of the federal reserve | $ 34,600,000 | $ 34,500,000
Number of correspondent banks | bank | 6 | 6
Available capacity | $ 365,000,000 | $ 445,000,000
Securities sold under repurchase agreements | 0 | 0
Revolving Credit Facility |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Line of credit facility |  | 50,000,000
Other borrowings | 0 | 0
Line of Credit | Unsecured Federal Funds Line of Credit |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Line of credit facility | 290,000,000 | 290,000,000
Borrowings outstanding | 0 | 0
Other borrowings | 0 | 0
Federal Reserve Bank Advances |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Line of credit facility | 1,450,000,000 |
Federal Reserve Bank Advances | FRB Discount Window and BIC Programs |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Borrowings during the period | 340,000,000 | 0
Borrowings outstanding | $ 340,000,000 | 0
Federal Reserve Bank Advances | BTFP Program |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Term of borrowings under the program | 1 year |
Spread on variable rate (percent) | 0.10% |
Borrowings outstanding | $ 0 |
Federal Reserve Bank Advances | Collateralized loan obligations |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Advances from FHLB collateralized | 1,400,000,000 |
Collateral on line of credit facility | 515,300,000 |
Term Advances |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
FHLB advances | $ 611,000,000 |
Weighted average life | 3 years |
Weighted average interest rate (percent) | 2.91% |
Putable Advances |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
FHLB advances | $ 200,000,000 |
Weighted average life | 4 years 6 months |
Weighted average interest rate (percent) | 3.44% |
Federal Home Loan Bank of San Francisco |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
FHLB stock | $ 25,700,000 | $ 22,600,000
Federal Home Loan Bank of San Francisco | Real Estate Loans |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Secured borrowing capacity from FHLB | 2,390,000,000 |
Amount of additional available borrowing | 1,160,000,000 |
Advances from FHLB collateralized | $ 3,470,000,000 |

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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480848/942-470-50-3 + Details
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- Definition Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480876/942-470-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Maturity period on variable rate advances made and reported by Federal Home Loan Bank (FHLBank), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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