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DERIVATIVES - (Schedule of Information about Interest Rate Swaps Designated as Cash Flow Hedges) (Details) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2020 USD ($) N | Dec. 31, 2019 USD ($) N
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Notional amount | $ 270,000,000.0 | $ 245,000,000.0
Fair Value | $ (11,001,000) | $ (3,667,000)
Weighted average pay rate | 1.93% | 2.05%
Weighted average receive rate | 0.22% | 1.83%
Weighted average maturity | 2 years 3 months 7 days | 2 years 5 months 12 days
Unrealized gain, net | $ (11,001,000) | $ (3,667,000)
Number of contracts | N | 13 | 12
Loan Level Swaps [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Notional amount | $ 853,532,000 | $ 793,875,000
Fair Value | $ 92,238,000 | $ 32,381,000
Weighted average pay rate | 4.02% | 4.12%
Weighted average receive rate | 1.92% | 3.54%
Weighted average maturity | 6 years 8 months 12 days | 7 years 3 months 18 days
Number of contracts | N | 98 | 91

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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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