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Derivative Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of notional amounts and estimated fair values of interest rate derivative contracts | The following table presents the notional amounts and estimated fair values of interest rate derivative contracts outstanding at March 31, 2021 and December 31, 2020:
| March 31, 2021 |  | December 31, 2020
| Notional Amounts |  | Estimated Fair Value |  | Notional Amounts |  | Estimated Fair Value
| (In thousands)
Non-hedging interest rate derivatives |  |  |  |  |  |  |
Interest rate swap asset (1) | $ | 315,681 |  |  | $ | 16,955 |  |  | $ | 308,126 |  |  | $ | 25,740 |
Interest rate swap liability (1) | 315,681 |  |  | (17,133) |  |  | 308,126 |  |  | (26,162) |
(1) The estimated fair value of derivatives with customers was $9.5 million and $25.4 million as of March 31, 2021 and December 31, 2020, respectively. The estimated fair value of derivatives with third parties was $(9.7) million and $(25.9) million as of March 31, 2021 and December 31, 2020, respectively.

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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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