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Commitments and Contingent Liabilities - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Commitments And Contingencies Liabilities [Line Items] |  |  |  |
Rental expenses | $ 1,600,000 | $ 1,400,000 | $ 4,900,000 | $ 4,200,000
Sublease income | 184,000 | $ 190,000 | 549,000 | $ 560,000
Minimum rental to be received in future on subleases | $ 808,000 |  | $ 808,000 |
Sublease contract maturity year |  |  | 2025 |
Fixed rate loan commitments maturity year |  |  | 2050 |
Variable rate loan commitments maturity year |  |  | 2048 |
Maximum |  |  |  |
Commitments And Contingencies Liabilities [Line Items] |  |  |  |
Commitments to make loans period |  |  | 90 days |
Loan commitments fixed interest rate | 18.00% |  | 18.00% |
Loan commitments variable interest rate | 8.25% |  | 8.25% |
Minimum |  |  |  |
Commitments And Contingencies Liabilities [Line Items] |  |  |  |
Loan commitments fixed interest rate | 1.25% |  | 1.25% |
Loan commitments variable interest rate | 1.25% |  | 1.25% |

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- Definition Commitments and contingencies liabilities. + References No definition available. + Details
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- Definition Fixed rate loan commitment period. + References No definition available. + Details
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- Definition Fixed rate loan commitments maturities ending year. + References No definition available. + Details
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- Definition Loan commitments bearing fixed interest rate, percentage. + References No definition available. + Details
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- Definition Loan commitments bearing variable interest rate, percentage. + References No definition available. + Details
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- Definition Sublease contract expiration period. + References No definition available. + Details
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- Definition Variable rate loan commitments maturities ending year. + References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Contractually required future rental payments receivable on noncancelable subleasing arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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