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Derivative Instruments (Details) - Not designated as hedging - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Derivative Instruments |  |
Fair Value, Derivative Assets | $ 4,880 | $ 13,357
Fair Value, Derivative Liabilities | 1,062 | 2,911
Notional Amount, Derivative Assets | 361,287 | 401,690
Notional Amount, Derivative Liabilities | 45,171 | 351,597
Interest rate swaps | Other assets |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 1,060 | 569
Notional Amount, Derivative Assets | 45,171 | 44,597
Interest rate swaps | Accrued expenses and other liabilities |  |
Derivative Instruments |  |
Fair Value, Derivative Liabilities | 1,062 | 572
Notional Amount, Derivative Liabilities | 45,171 | 44,597
Interest rate lock commitments | Other assets |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 2,813 | 10,124
Notional Amount, Derivative Assets | 107,769 | 270,103
Forward loan sales commitments | Other assets |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 602 | 2,664
Notional Amount, Derivative Assets | 18,877 | 86,990
TBA mortgage backed securities | Other assets |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 405 |
Notional Amount, Derivative Assets | $ 189,470 |
TBA mortgage backed securities | Accrued expenses and other liabilities |  |
Derivative Instruments |  |
Fair Value, Derivative Liabilities |  | 2,339
Notional Amount, Derivative Liabilities |  | $ 307,000

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: 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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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