Fair Value Measurements - Schedule of Recorded Amount of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	$ 1,474,945	$ 1,598,666
Total liabilities measured at fair value on a recurring basis	41,637
U. S. agency securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	656,277	669,728
Residential mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	714,148	820,503
Loans held for sale		6,734
Commercial mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	48,004	50,213
Municipal bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	7,802	10,087
Corporate bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	1,664	1,808
Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale		6,734
Total assets measured at fair value on a recurring basis	1,516,733	1,636,532
Derivative liability		2
Total liabilities measured at fair value on a recurring basis		30,067
Recurring | Interest rate product
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	41,787	31,039
Derivative liability	41,637	30,065
Recurring | U.S treasury bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	47,050	46,327
Recurring | U. S. agency securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	656,277	669,728
Recurring | Residential mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	714,148	820,503
Recurring | Commercial mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	48,004	50,213
Recurring | Municipal bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	7,802	10,087
Recurring | Corporate bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	1,664	1,808
Recurring | Mortgage banking derivatives | Derivative Financial Instruments, Assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	1	93
​Quoted Prices (Level 1) | Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale		0
Total assets measured at fair value on a recurring basis	0	0
Derivative liability		0
Total liabilities measured at fair value on a recurring basis	0	0
​Quoted Prices (Level 1) | Recurring | Interest rate product
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	0	0
Derivative liability	0	0
​Quoted Prices (Level 1) | Recurring | U.S treasury bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | U. S. agency securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | Residential mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | Commercial mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | Municipal bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | Corporate bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
​Quoted Prices (Level 1) | Recurring | Mortgage banking derivatives | Derivative Financial Instruments, Assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	0	0
Significant Other Observable Inputs (Level 2) | Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale		6,734
Total assets measured at fair value on a recurring basis	1,516,733	1,636,439
Derivative liability		2
Total liabilities measured at fair value on a recurring basis	41,637	30,067
Significant Other Observable Inputs (Level 2) | Recurring | Interest rate product
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	41,787	31,039
Derivative liability	41,637	30,065
Significant Other Observable Inputs (Level 2) | Recurring | U.S treasury bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	47,050	46,327
Significant Other Observable Inputs (Level 2) | Recurring | U. S. agency securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	656,277	669,728
Significant Other Observable Inputs (Level 2) | Recurring | Residential mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	714,148	820,503
Significant Other Observable Inputs (Level 2) | Recurring | Commercial mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	48,004	50,213
Significant Other Observable Inputs (Level 2) | Recurring | Municipal bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	7,802	10,087
Significant Other Observable Inputs (Level 2) | Recurring | Corporate bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	1,664	1,808
Significant Other Observable Inputs (Level 2) | Recurring | Mortgage banking derivatives | Derivative Financial Instruments, Assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	1	0
Significant Other Unobservable Inputs (Level 3) | Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale		0
Total assets measured at fair value on a recurring basis	0	93
Derivative liability		0
Total liabilities measured at fair value on a recurring basis	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Interest rate product
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | U.S treasury bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | U. S. agency securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Residential mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Commercial mortgage-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Municipal bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Corporate bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available-for-sale	0	0
Significant Other Unobservable Inputs (Level 3) | Recurring | Mortgage banking derivatives | Derivative Financial Instruments, Assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset	$ 0	$ 93