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Securities (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Securities, Trading, and Equity Securities, FV-NI, Total | $ 0 | $ 0 |
Securities held-to-maturity, amortized cost | 58,730,000 |  |
Accrued interest receivable on held-to-maturity securities | 100,000 | 100,000 |
Allowance for credit loss | 0 |  |
Accrued interest receivable on available-for-sale debt securities | 1,500,000 | 1,300,000 |
Mortgage Backed Securities Available for Sale Amortized Cost | 340,800,000 | 308,100,000 | $ 128,000,000.0
Proceeds from Sale of Debt Securities, Available-for-sale | 45,000,000.0 | 221,000,000.0 | $ 26,400,000
Non-qualified Deferred Compensation Plan [Member] | Other Assets [Member] |  |  |
Deferred Compensation Plan, Amounts Held in Rabbi Trust | 26,300,000 | 22,600,000 |
Collateralized Mortgage Obligations by Commercial Real Estate [Member] |  |  |
Allowance for credit loss | $ 0 | $ 0 |

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- Definition Interest earned but not yet received by the entity on its debt securities held-to-maturity. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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