Fair Value Measurement of Assets and Liabilities - Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investment securities:
Equity securities	$ 69,105	$ 64,464
Trading debt securities	3,979	3,973
Available for sale debt securities:
Available for sale debt securities	2,212,092	1,296,576
Loans held for sale	11,137	20,640
Non-recurring fair value measurements:
Unpaid principal balances of loans held for sale	11,000	20,100
U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	286,274	288,157
U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	22,766	23,702
Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	188,688	191,690
Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	1,535,690	626,572
Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	178,674	166,455
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements
Investment securities:
Equity securities	23,094	23,307
Trading debt securities	3,979	3,973
Available for sale debt securities:
Available for sale debt securities	286,274	288,157
Loans held for sale	0	0
Other assets	0	0
Total assets	313,347	315,437
Liabilities
Other liabilities	0	0
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	286,274	288,157
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring fair value measurements | Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-recurring fair value measurements
Non-recurring fair value measurements:
Non-performing loan held for sale	0	0
Collateral dependent loans	0	0
Foreclosed assets	0	0
Total	0	0
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements
Investment securities:
Equity securities	0	0
Trading debt securities	0	0
Available for sale debt securities:
Available for sale debt securities	1,925,818	1,008,419
Loans held for sale	11,137	20,640
Other assets	514,661	466,227
Total assets	2,451,616	1,495,286
Liabilities
Other liabilities	531,746	488,103
Total liabilities	531,746	488,103
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	22,766	23,702
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	188,688	191,690
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	1,535,690	626,572
Significant Other Observable Inputs (Level 2) | Recurring fair value measurements | Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	178,674	166,455
Significant Other Observable Inputs (Level 2) | Non-recurring fair value measurements
Non-recurring fair value measurements:
Non-performing loan held for sale	8,750	10,000
Collateral dependent loans	0	0
Foreclosed assets	0	0
Total	8,750	10,000
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements
Investment securities:
Equity securities	0	0
Trading debt securities	0	0
Available for sale debt securities:
Available for sale debt securities	0	0
Loans held for sale	0	0
Other assets	0	0
Total assets	0	0
Liabilities
Other liabilities	0	0
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring fair value measurements | Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	0	0
Significant Unobservable Inputs (Level 3) | Non-recurring fair value measurements
Non-recurring fair value measurements:
Non-performing loan held for sale	0	0
Collateral dependent loans	112,575	90,580
Foreclosed assets	9,666	1,444
Total	122,241	92,024
Fair Value | Recurring fair value measurements
Investment securities:
Trading debt securities	3,979	3,973
Available for sale debt securities:
Available for sale debt securities	2,212,092	1,296,576
Loans held for sale	11,137	20,640
Other assets	514,661	466,227
Total assets	2,777,122	1,822,849
Liabilities
Other liabilities	531,746	488,103
Total liabilities	531,746	488,103
Fair Value | Recurring fair value measurements | U.S. Treasury securities
Available for sale debt securities:
Available for sale debt securities	286,274	288,157
Fair Value | Recurring fair value measurements | U.S. government agency securities
Available for sale debt securities:
Available for sale debt securities	22,766	23,702
Fair Value | Recurring fair value measurements | Obligations of states and political subdivisions
Available for sale debt securities:
Available for sale debt securities	188,688	191,690
Fair Value | Recurring fair value measurements | Residential mortgage-backed securities
Available for sale debt securities:
Available for sale debt securities	1,535,690	626,572
Fair Value | Recurring fair value measurements | Corporate and other debt securities
Available for sale debt securities:
Available for sale debt securities	178,674	166,455
Fair Value | Non-recurring fair value measurements
Non-recurring fair value measurements:
Non-performing loan held for sale	8,750	10,000
Collateral dependent loans	112,575	90,580
Foreclosed assets	9,666	1,444
Total	130,991	102,024
Fair Value | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Recurring fair value measurements
Investment securities:
Equity securities	23,094	23,307
Fair Value | Significant Unobservable Inputs (Level 3)
Investment securities:
Equity securities	33,852	29,031
Fair Value | NAV | Recurring fair value measurements
Investment securities:
Equity securities	$ 12,159	$ 12,126