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Acquisition Activities (Details) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 03, 2023 USD ($) | Oct. 01, 2022 USD ($) item shares | Sep. 01, 2022 USD ($) item shares | Sep. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) $ / shares | Dec. 31, 2022 USD ($) | Aug. 31, 2022 $ / shares
Acquisition Activities |  |  |  |  |  |  |  |
Provision for credit loss expense |  |  |  |  | $ 3,725 | $ 12,386 |  |
Cambr |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Cash consideration | $ 46,524 |  |  |  |  |  |  |
Transaction value | 46,524 |  |  |  |  |  |  |
Acquisition related expenses |  |  |  | $ 100 | $ 1,000 |  |  |
Acquired through acquisition | 18,000 |  |  |  |  |  |  |
Cambr | Core deposit intangible |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Acquired through acquisition | $ 1,700,000 |  |  |  |  |  |  |
Rock Canyon Bank |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Cash consideration |  |  | $ 16,141 |  |  |  |  |
Shares issued | shares |  |  | 3,096,745 |  |  |  |  |
Transaction value |  |  | $ 140,413 |  |  |  |  |
Closing price | $ / shares |  |  |  |  |  |  |  | $ 40.13
Number of banking centers added | item |  |  | 7 |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  | $ 12,300 |
Provision for credit loss expense |  |  |  |  |  |  | 5,400 |
Acquired through acquisition |  |  | $ 52,900 |  |  |  |  |
Rock Canyon Bank | Core deposit intangible |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Acquired through acquisition |  |  | $ 13,300 |  |  |  |  |
Bank of Jackson Hole |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Cash consideration |  | $ 50,989 |  |  |  |  |  |
Shares issued | shares |  | 4,391,964 |  |  |  |  |  |
Transaction value |  | $ 213,448 |  |  |  |  |  |
Closing price | $ / shares |  |  |  |  |  | $ 36.99 |  |
Number of banking centers added | item |  | 12 |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  | 24,500 |
Provision for credit loss expense |  |  |  |  |  |  | $ 16,300 |
Acquired through acquisition |  | $ 111,300 |  |  |  |  |  |
Bank of Jackson Hole | Core deposit intangible |  |  |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |  |  |
Acquired through acquisition |  | $ 29,400 |  |  |  |  |  |

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