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Basis of Presentation, Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
 12 Months Ended
Apr. 01, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2022
Business Acquisition [Line Items]          
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]   Income from mortgage banking services, net Income from mortgage banking services, net Income from mortgage banking services, net  
Goodwill impairment loss   $ 0 $ 0 $ 0  
Impairment of long-lived assets   $ 720,000 0 678,000  
Defined contribution plan, maximum annual contributions per employee, percent   100.00%      
Defined contribution plan, employer matching contribution, percent of employees' elective deferrals   100.00%      
Defined contribution plan, employer matching contribution, percent of match   6.00%      
Employer discretionary contribution amount   $ 5,200,000 4,900,000 $ 4,400,000  
Right-of-use assets   28,404,000 $ 0    
Lease liability   $ 31,267,000      
Accounting Standards Update 2016-02          
Business Acquisition [Line Items]          
Right-of-use assets         $ 35,200,000
Lease liability         $ 38,500,000
Core Deposits Intangibles          
Business Acquisition [Line Items]          
Finite-lived intangible asset, useful life   10 years      
Minimum          
Business Acquisition [Line Items]          
Mortgage Servicing Rights, base servicing fee as percentage of remaining outstanding principle balances of loans   0.25%      
Promises and equipment, useful lives   3 years      
Minimum | Customer Relationships          
Business Acquisition [Line Items]          
Finite-lived intangible asset, useful life   10 years      
Maximum          
Business Acquisition [Line Items]          
Mortgage Servicing Rights, base servicing fee as percentage of remaining outstanding principle balances of loans   0.50%      
Promises and equipment, useful lives   39 years      
Maximum | Customer Relationships          
Business Acquisition [Line Items]          
Finite-lived intangible asset, useful life   16 years      
FirstSun Capital Bancorp and Pioneer Bancshares, Inc. Merger          
Business Acquisition [Line Items]          
Shares issuable in merger (in shares) 1.0443