Fair Value - Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financial Assets
Held-to-maturity debt securities	$ 646,050	$ 680,313
Time deposits with other banks	5,207	5,857
Loans, net	10,064,812	9,914,009
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Time deposits with other banks	0	0
Loans, net	0	0
Financial Liabilities
Deposits	0	0
FHLB borrowings	0	0
Long-term debt	0	0
Significant Other Observable Inputs (Level 2)
Financial Assets
Time deposits with other banks	5,206	5,756
Loans, net	0	0
Financial Liabilities
Deposits	0	0
FHLB borrowings	240,697	49,745
Long-term debt	93,092	100,851
Significant Unobservable Inputs (Level 3)
Financial Assets
Time deposits with other banks	0	0
Loans, net	9,933,594	9,805,693
Financial Liabilities
Deposits	12,242,892	11,775,613
FHLB borrowings	0	0
Long-term debt	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Held-to-maturity debt securities	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Financial Assets
Held-to-maturity debt securities	538,485	558,359
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial Assets
Held-to-maturity debt securities	0	0
Carrying Value
Financial Assets
Time deposits with other banks	5,207	5,857
Loans, net	10,060,837	9,898,767
Financial Liabilities
Deposits	12,243,585	11,776,935
FHLB borrowings	245,000	50,000
Long-term debt	106,800	109,458
Carrying Value | Fair Value, Measurements, Recurring
Financial Assets
Held-to-maturity debt securities	$ 646,050	$ 680,313