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Derivatives and Balance Sheet Offsetting - Fair value of derivatives & classifications table (Details) - Not Designated as Hedging Instrument [Member] - Interest Rate Contracts [Member] - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative [Line Items] |  |
Fair value of asset derivative instruments | $ 29,139 | $ 46,184
Fair value of liability derivative instruments | 29,139 | 46,637
Other Assets [Member] | Interest Rate Lock Commitments Contracts |  |
Derivative [Line Items] |  |
Fair value of asset derivative instruments | 482 | 1,096
Other Assets [Member] | Interest rate Forward Sales Contracts |  |
Derivative [Line Items] |  |
Fair value of asset derivative instruments | 0 | 0
Other Assets [Member] | Interest Rate Swap Contracts |  |
Derivative [Line Items] |  |
Fair value of asset derivative instruments | 29,139 | 46,184
Other Liabilities [Member] | Interest Rate Lock Commitments Contracts |  |
Derivative [Line Items] |  |
Fair value of liability derivative instruments | 0 | 0
Other Liabilities [Member] | Interest rate Forward Sales Contracts |  |
Derivative [Line Items] |  |
Fair value of liability derivative instruments | 79 | 165
Other Liabilities [Member] | Interest Rate Swap Contracts |  |
Derivative [Line Items] |  |
Fair value of liability derivative instruments | $ 29,139 | $ 46,637

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- Definition Fair value, before 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 elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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