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Allowance for Credit Losses - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Allowance For Loan And Lease Losses [Line Items]          
Charge-offs, net $ 300 $ 300 $ 600 $ 900  
Increase in allowance for credit losses   (2,100)   (1,200)  
Provision (release) expense 2,550 2,386 3,600 2,061  
Provision for credit loss expense (release) 1,700 $ 2,504 2,600 $ 2,182  
Accrued interest receivable 33,400   33,400   $ 31,800
Rock Canyon Bank          
Allowance For Loan And Lease Losses [Line Items]          
Increase in allowance for credit losses $ 2,200   $ (3,000)