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Commitments and Contingent Liabilities - Summary of Contract or Notional Amount of Outstanding Loan and Lease Commitments (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
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Sep. 30, 2021 | Dec. 31, 2020
Commitments And Contingencies Liabilities [Line Items] |  |
Fixed Rate | $ 174,501 | $ 106,835
Variable Rate | 1,579,465 | 1,319,992
Total | 1,753,966 | 1,426,827
Commitments to Extend Credit |  |
Commitments And Contingencies Liabilities [Line Items] |  |
Fixed Rate | 173,848 | 106,183
Variable Rate | 1,520,986 | 1,261,872
Total | 1,694,834 | 1,368,055
Letters of Credit |  |
Commitments And Contingencies Liabilities [Line Items] |  |
Fixed Rate | 653 | 652
Variable Rate | 58,479 | 58,120
Total | $ 59,132 | $ 58,772

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- Definition Commitments and contingencies liabilities. + References No definition available. + Details
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- Definition Loans and leases receivable commitments fixed and variable rates. + References No definition available. + Details
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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61082-112788 + Details
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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at interest rates that increase or decrease depending on certain facts or circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61082-112788 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788 + Details
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