Loans and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 31,943,284		$ 31,943,284		$ 29,041,605
Percentage of loan portfolio as commercial loan	79.20%		79.20%
Risk rated loans	$ 1,500		$ 1,500
Percentage of credit exposure to risk based capital	25.00%		25.00%
Loans and other extensions of credit granted to directors, executive officers, and their related entities	$ 38,300		$ 38,300		20,900
Amount drawn from loans and other extensions of credit granted	34,400		34,400		16,000
Commercial loans held-for-sale	20,513		20,513		21,093
Mortgage loans held-for-sale	25,100		25,100		$ 12,900
Loans sold			511,300	$ 691,700
Gain (Loss) on Sale of Mortgage Loans	$ 2,000	$ 1,100	$ 5,632	$ 7,333
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	83.10%		83.10%		85.90%
Non-owner occupied commercial real estate and multifamily loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	256.40%		256.40%		249.60%