Basis of Presentation, Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2023	Apr. 01, 2022	Dec. 31, 2020
Business Acquisition [Line Items]
Loans, allowance for credit losses	$ 80,398,000	$ 65,917,000	$ 47,547,000			$ 47,766,000
Deferred tax assets, net	46,259,000	48,355,000
Cumulative reduction to retained earnings, net of tax	$ (457,522,000)	$ (357,797,000)
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
Allowance for credit loss on outstanding servicer advances	$ 0	$ 0	$ 0
Goodwill impairment loss	0	0	0
Impairment of long-lived assets	$ 0	720,000	0
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	$ 5,300,000	5,200,000	$ 4,900,000
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	1 year
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
Unfunded Loan Commitment
Business Acquisition [Line Items]
Loans, allowance for credit losses	$ 2,309,000	$ 1,313,000
Accounting Standards Update 2016-13 | Revision of Prior Period, Adjustment
Business Acquisition [Line Items]
Loans, allowance for credit losses				$ 5,300,000
Deferred tax assets, net				1,200,000
Cumulative reduction to retained earnings, net of tax				3,800,000
Accounting Standards Update 2016-13 | Revision of Prior Period, Adjustment | Unfunded Loan Commitment
Business Acquisition [Line Items]
Loans, allowance for credit losses				$ (200,000)
FirstSun Capital Bancorp and Pioneer Bancshares, Inc. Merger
Business Acquisition [Line Items]
Shares issuable in merger (in shares)					1.0443