Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Balance sheet assets:
Investment securities	$ 615,855	$ 754,468
Carrying Amount
Balance sheet assets:
Accrued interest receivable	8,185	8,297
Total	2,058,775	2,033,074
Balance sheet liabilities:
Accrued interest payable	597	66
Total	2,260,163	2,324,883
Fair Value
Balance sheet assets:
Cash and cash equivalents	408,435	200,942
Investment securities	615,855	754,468
Loans, net	986,503	1,004,682
Accrued interest receivable	8,185	8,297
Total	2,018,978	1,968,389
Balance sheet liabilities:
Deposits	1,177,342	1,257,217
Accounts and drafts payable	1,082,224	1,067,600
Accrued interest payable	597	66
Total	$ 2,260,163	$ 2,324,883