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Allowance for Credit Losses - Troubled Debt Restructuring Modifications (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) loan contract | Dec. 31, 2021 USD ($) contract loan | Dec. 31, 2020 USD ($) contract
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract | 264 | 1,689 | 5
Recorded Investment | $ 2,625 | $ 23,765 | $ 7,795
Related ACL | 491 | 2,605 | $ 590
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | 7,000,000 | 6,700,000 |
Commitments related to borrowers who had loan terms modified in a TDR | $ 100 | $ 200 |
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract | 215 | 414 | 1
Recorded Investment, Defaulted TDRs | $ 3,164 | $ 7,659 | $ 500
Commercial and Industrial |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract | 5 | 11 | 1
Recorded Investment | $ 205 | $ 1,481 | $ 500
Related ACL | $ 17 | $ 124 | $ 30
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract | 2 | 3 | 1
Recorded Investment, Defaulted TDRs | $ 541 | $ 569 | $ 500
Commercial real estate |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract |  | 1 | 3
Recorded Investment |  | $ 346 | $ 6,470
Related ACL |  | $ 78 | $ 470
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract |  | 1 |
Recorded Investment, Defaulted TDRs |  | $ 356 |
Construction |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract |  | 12 |
Recorded Investment |  | $ 689 |
Related ACL |  | $ 69 |
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract |  | 1 |
Recorded Investment, Defaulted TDRs |  | $ 450 |
Residential mortgage |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract |  | 13 | 1
Recorded Investment |  | $ 5,539 | $ 825
Related ACL |  | $ 207 | $ 90
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract |  | 4 |
Recorded Investment, Defaulted TDRs |  | $ 1,012 |
Number of loans collateralized by real estate property modified in a TDR in the process of foreclosure | loan | 2 | 1 |
Loans collateralized by real estate properties that were modified in a TDR that was in process of foreclosure | $ 600 | $ 300 |
Consumer Portfolio Segment [Member] |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract | 258 | 1,652 |
Recorded Investment | $ 2,173 | $ 15,710 |
Related ACL | $ 443 | $ 2,127 |
Loans modified in TDRs that experienced a payment default |  |  |
Number of Contracts, Defaulted TDRs | contract | 213 | 405 |
Recorded Investment, Defaulted TDRs | $ 2,623 | $ 5,272 |
Residential Mortgage loans |  |  |
Troubled debt restructuring modifications |  |  |
Number of Contracts | contract | 1 |  |
Recorded Investment | $ 247 |  |
Related ACL | $ 31 |  |
Other real estate owned and repossessed personal property |  |  |
Loans modified in TDRs that experienced a payment default |  |  |
Number of foreclosed properties | loan | 1 | 1 |
Real estate property held from a foreclosed TDR | $ 100 | $ 200 |
Commitments to extend credit |  |  |
Troubled debt restructuring modifications |  |  |
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | 6,760,395 | 6,490,301 |
Standby letters of credit |  |  |
Troubled debt restructuring modifications |  |  |
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | 244,275 | 182,447 |
Commercial letters of credit |  |  |
Troubled debt restructuring modifications |  |  |
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | $ 7,299 | $ 3,307 |

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