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Acquisition Activities - Summary of PCD loans purchased (Details) - USD ($)
$ in Thousands
Oct. 01, 2022
Sep. 01, 2022
Bank of Jackson Hole    
Business Acquisition [Line Items]    
Unpaid principal balance $ 13,902  
PCD allowance for credit loss at acquisition (3,764)  
(Discount) premium on acquired loans (578)  
Purchase price of PCD loans 9,560  
Bank of Jackson Hole | Commercial    
Business Acquisition [Line Items]    
Unpaid principal balance 5,061  
PCD allowance for credit loss at acquisition (151)  
(Discount) premium on acquired loans (336)  
Purchase price of PCD loans 4,574  
Bank of Jackson Hole | Commercial real estate non-owner occupied    
Business Acquisition [Line Items]    
Unpaid principal balance 8,353  
PCD allowance for credit loss at acquisition (3,557)  
(Discount) premium on acquired loans (226)  
Purchase price of PCD loans 4,570  
Bank of Jackson Hole | Residential    
Business Acquisition [Line Items]    
Unpaid principal balance 476  
PCD allowance for credit loss at acquisition (55)  
(Discount) premium on acquired loans (16)  
Purchase price of PCD loans 405  
Bank of Jackson Hole | Consumer    
Business Acquisition [Line Items]    
Unpaid principal balance 12  
PCD allowance for credit loss at acquisition (1)  
Purchase price of PCD loans $ 11  
Rock Canyon Bank    
Business Acquisition [Line Items]    
Unpaid principal balance   $ 13,145
PCD allowance for credit loss at acquisition   (2,474)
(Discount) premium on acquired loans   (773)
Loans previously charged-off by RCB   (2,054)
Purchase price of PCD loans   7,844
Rock Canyon Bank | Commercial    
Business Acquisition [Line Items]    
Unpaid principal balance   12,079
PCD allowance for credit loss at acquisition   (2,257)
(Discount) premium on acquired loans   (787)
Loans previously charged-off by RCB   (2,051)
Purchase price of PCD loans   6,984
Rock Canyon Bank | Commercial real estate non-owner occupied    
Business Acquisition [Line Items]    
Unpaid principal balance   220
PCD allowance for credit loss at acquisition   (2)
(Discount) premium on acquired loans   19
Purchase price of PCD loans   237
Rock Canyon Bank | Residential    
Business Acquisition [Line Items]    
Unpaid principal balance   843
PCD allowance for credit loss at acquisition   (215)
(Discount) premium on acquired loans   (5)
Purchase price of PCD loans   623
Rock Canyon Bank | Consumer    
Business Acquisition [Line Items]    
Unpaid principal balance   3
Loans previously charged-off by RCB   $ (3)