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Borrowings - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Disclosure [Abstract] |  |  |
Pledged loans receivable, carrying value | $ 1,990,000,000 |  |
Total borrowing capacity available from the collateral | 1,540,000,000 |  |
Remaining available borrowing capacity | 1,070,000,000.00 |  |
Available for use through the Federal Reserve Bank of San Francisco discount window | 22,000,000.0 |  |
Pledged loans, carrying values | 23,400,000 |  |
Borrowings | 0 |  |
Advances from the FHLB | 350,000,000.0 | $ 137,500,000 |
Increase in the advances from the FHLB | 212,500,000 |  |
Overnight advances from federal home loan banks | 250,000,000.0 |  |
Term borrowings | 100,000,000.0 |  |
Interest expense on FHLB | $ 2,200,000 | $ 1,700,000 | $ 2,200,000
Weighted-average interest rates | 1.52% | 1.17% | 1.42%

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- Definition Borrowing capacity available based on pledged collateral. + References No definition available. + Details
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- Definition Borrowing capacity based on pledged collateral. + References No definition available. + Details
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- Definition Carrying Value Of Loans Pledged As Collateral For FHLB Advances + References No definition available. + Details
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- Definition Federal Home Loan Bank, Advances, Maturities Summary, Due Overnight + References No definition available. + Details
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- Definition Amount of interest expense on loans received from Federal Home Loan Bank (FHLB). + References No definition available. + Details
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- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions. + References No definition available. + Details
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- Definition The calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date. + 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 210.9-03.13(3)(a)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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