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Derivatives and Hedging Activities - Additional Information (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) item | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Oct. 31, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Participating Mortgage Loans, Mortgage Obligations, Amount | $ 27,600 |  |  |
Number of Participation loans purchased | item | 4 |  |  |
Interest Rate Swap | Cash flow hedges |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative, Notional Amount |  |  |  | $ 400,000
Derivative, Fixed Interest Rate |  |  |  | 3.018%
Expected interest income on termination |  | $ 2,000 |  |
Not Designated as Hedging Instrument | Interest Rate Swap |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Derivative, Notional Amount | $ 139,300 |  | $ 142,800 |
Number of Interest Rate Derivatives Held | 18 |  | 19 |
Valley Bank | Not Designated as Hedging Instrument |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Number of Loans Acquired | item | 7 |  |  |
Valley Bank | Not Designated as Hedging Instrument | Interest Rate Swap |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Number of Loans Acquired | item | 7 |  |  |
Number of Loans Paid Off | item | 5 |  |  |
Derivative, Notional Amount | $ 559 |  |  |
Number of Interest Rate Derivatives Held | 2 |  |  |

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- Definition The number of loans acquired. + References No definition available. + Details
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- Definition Number of participation loans purchased during the period. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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