Loans and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 33,162,873		$ 32,676,091
Percentage of loan portfolio as commercial loan	79.60%
Risk rated loans	$ 1,500
Percentage of credit exposure to risk based capital	25.00%
Loans and other extensions of credit granted to directors, executive officers, and their related entities	$ 37,600		37,700
Amount drawn from loans and other extensions of credit granted	34,400		34,700
Commercial loans held-for-sale	6,068		9,280
Mortgage loans held-for-sale	27,700		$ 20,200
Loans sold	148,600	$ 120,100
Gain (Loss) on Sale of Mortgage Loans	$ 2,879	$ 2,053
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	77.50%		84.20%
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	258.00%		259.00%