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Borrowings - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Disclosure [Abstract] |  |  |
Pledged loans receivable, carrying value | $ 2,300,000,000 |  |
Total borrowing capacity available from the collateral | 1,840,000,000 |  |
Available borrowing capacity | 1,610,000,000 |  |
Available for use through the Federal Reserve Bank of San Francisco Discount Window | 32,800,000 |  |
Pledged loans, carrying values | 34,700,000 |  |
Borrowings | 0 |  |
Advances from the FHLB | 137,500,000 | $ 150,000,000.0 |
Decrease in the advances from the FHLB | 12,500,000 |  |
Interest expense on FHLB | $ 1,700,000 | $ 2,200,000 | $ 763,000
Weighted-average interest rates | 1.17% | 1.42% | 1.89%

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- Definition Borrowing. + References No definition available. + Details
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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 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 http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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