v3.26.1
Borrowings - Narrative (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Oct. 01, 2022
USD ($)
item
Assets Sold under Agreements to Repurchase [Line Items]              
Amount of repurchase agreements $ 20,200     $ 20,200   $ 17,400  
Fair value 585,533     585,533   528,639  
Federal home loan bank, advances, general debt obligations, maximum amount available 2,000,000     2,000,000      
Loans receivable 9,663,781     9,663,781   7,345,941  
Interest expense related to FHLB advances 900   $ 1,200 1,000 $ 2,300    
Prepayment penalty   $ 100          
Remaining balance on the note 202,003     202,003   54,540  
Bank of Jackson Hole              
Assets Sold under Agreements to Repurchase [Line Items]              
Number of subordinated note purchase agreements assumed | item             3
5.875% Fixed-To-Floating Rate Note, Maturing 2036              
Assets Sold under Agreements to Repurchase [Line Items]              
Principal amount   $ 150,000          
Interest rate   5.875%          
Variable rate basis (as a percent)   2.41%          
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   us-gaap:SecuredOvernightFinancingRateSofrMember          
Long-term debt issuance costs 2,600     2,600      
Remaining balance on the note 147,400     147,400      
Interest expense 2,200     3,300      
Fixed-To-Floating Rate Note, Maturing June 2031 | Bank of Jackson Hole              
Assets Sold under Agreements to Repurchase [Line Items]              
Subordinated note             $ 15,000
Remaining balance on the note 15,000     15,000   15,000  
Interest expense 100   100 300 300    
Line of credit              
Assets Sold under Agreements to Repurchase [Line Items]              
FHLB advances 125,000     125,000   0  
Subordinated Debt | Fixed-To-Floating Rate Note, Maturing November 2031              
Assets Sold under Agreements to Repurchase [Line Items]              
Subordinated note 40,000     $ 40,000      
Variable rate basis (as a percent)       2.03%      
Remaining balance on the note 40,000     $ 40,000   40,000  
Interest expense 300   $ 300 $ 600 $ 600    
Interest rate (as a percent)       3.00%      
Redemption price as a percent of principal       100.00%      
Subordinated Debt | Fixed-To-Floating Rate Note, Maturing June 2031 | Bank of Jackson Hole              
Assets Sold under Agreements to Repurchase [Line Items]              
Variable rate basis (as a percent)       3.06%      
Interest rate (as a percent)       3.75%      
Redemption price as a percent of principal       100.00%      
Asset Pledged as Collateral              
Assets Sold under Agreements to Repurchase [Line Items]              
Fair value 0     $ 0   0  
Asset Pledged as Collateral | Securities Sold under Agreements to Repurchase              
Assets Sold under Agreements to Repurchase [Line Items]              
Fair value 27,400     27,400   28,500  
Excess collateral pledged $ 7,100     $ 7,100   $ 11,100  
Asset Pledged as Collateral | Federal Home Loan Bank Advances              
Assets Sold under Agreements to Repurchase [Line Items]              
Financing Receivable, Pledging Purpose [Extensible Enumeration] Noninterest-Bearing Deposit Liabilities     Noninterest-Bearing Deposit Liabilities   Noninterest-Bearing Deposit Liabilities  
Fair value of available-for-sale investment securities pledged as collateral $ 0     $ 0   $ 0  
Loans receivable $ 3,600,000     $ 3,600,000   $ 2,400,000