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Fair Value of Financial Instruments - Fair Value of Assets and Liabilities Recorded on a Recurring Basis (Details) - USD ($)
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale $ 1,160,965,000   $ 1,253,631,000      
Securities carried at fair value through income 6,533,000   6,808,000      
Mortgage servicing rights (“MSR”) 0 $ 0 15,637,000 $ 19,189,000 $ 19,086,000 $ 20,824,000
State and municipal securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 288,862,000   282,126,000      
Securities carried at fair value through income 6,533,000   6,808,000      
Corporate bonds            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 80,268,000   83,635,000      
Commercial mortgage-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 100,172,000   93,396,000      
Residential mortgage-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 475,169,000   506,502,000      
Commercial collateralized mortgage obligations            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 48,510,000   35,183,000      
Residential collateralized mortgage obligations            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 122,597,000   130,144,000      
Asset-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale     43,005,000      
Fair Value, Measurements, Recurring            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 1,160,965,000   1,253,631,000      
Securities carried at fair value through income 6,533,000   6,808,000      
Loans held for sale 7,631,000   16,852,000      
Mortgage servicing rights (“MSR”)     15,637,000      
Other assets - derivatives 13,135,000   20,487,000      
Total recurring fair value measurements - assets 1,188,264,000   1,313,415,000      
Other liabilities - derivatives (11,993,000)   (18,300,000)      
Total recurring fair value measurements - liabilities (11,993,000)   (18,300,000)      
Fair Value, Measurements, Recurring | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 30,729,000   55,480,000      
Securities carried at fair value through income 0   0      
Loans held for sale 0   0      
Mortgage servicing rights (“MSR”)     0      
Other assets - derivatives 0   0      
Total recurring fair value measurements - assets 30,729,000   55,480,000      
Other liabilities - derivatives 0   0      
Total recurring fair value measurements - liabilities 0   0      
Fair Value, Measurements, Recurring | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 1,087,081,000   1,147,704,000      
Securities carried at fair value through income 0   0      
Loans held for sale 7,631,000   16,852,000      
Mortgage servicing rights (“MSR”)     0      
Other assets - derivatives 13,135,000   20,487,000      
Total recurring fair value measurements - assets 1,107,847,000   1,185,043,000      
Other liabilities - derivatives (11,993,000)   (18,300,000)      
Total recurring fair value measurements - liabilities (11,993,000)   (18,300,000)      
Fair Value, Measurements, Recurring | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 43,155,000   50,447,000      
Securities carried at fair value through income 6,533,000   6,808,000      
Loans held for sale 0   0      
Mortgage servicing rights (“MSR”)     15,637,000      
Other assets - derivatives 0   0      
Total recurring fair value measurements - assets 49,688,000   72,892,000      
Other liabilities - derivatives 0   0      
Total recurring fair value measurements - liabilities 0   0      
Fair Value, Measurements, Recurring | State and municipal securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 288,862,000   282,126,000      
Fair Value, Measurements, Recurring | State and municipal securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | State and municipal securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 246,707,000   232,679,000      
Fair Value, Measurements, Recurring | State and municipal securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 42,155,000   49,447,000      
Fair Value, Measurements, Recurring | Corporate bonds            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 80,268,000   83,635,000      
Fair Value, Measurements, Recurring | Corporate bonds | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Corporate bonds | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 79,268,000   82,635,000      
Fair Value, Measurements, Recurring | Corporate bonds | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 1,000,000   1,000,000      
Fair Value, Measurements, Recurring | U.S. treasury securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 30,729,000   55,480,000      
Fair Value, Measurements, Recurring | U.S. treasury securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 30,729,000   55,480,000      
Fair Value, Measurements, Recurring | U.S. treasury securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | U.S. treasury securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | U.S. government agency securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 14,658,000   24,160,000      
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 14,658,000   24,160,000      
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 100,172,000   93,396,000      
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 100,172,000   93,396,000      
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Residential mortgage-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 475,169,000   506,502,000      
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 475,169,000   506,502,000      
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Commercial collateralized mortgage obligations            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 48,510,000   35,183,000      
Fair Value, Measurements, Recurring | Commercial collateralized mortgage obligations | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Commercial collateralized mortgage obligations | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 48,510,000   35,183,000      
Fair Value, Measurements, Recurring | Commercial collateralized mortgage obligations | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Residential collateralized mortgage obligations            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 122,597,000   130,144,000      
Fair Value, Measurements, Recurring | Residential collateralized mortgage obligations | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 0   0      
Fair Value, Measurements, Recurring | Residential collateralized mortgage obligations | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale 122,597,000   130,144,000      
Fair Value, Measurements, Recurring | Residential collateralized mortgage obligations | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale $ 0   0      
Fair Value, Measurements, Recurring | Asset-backed securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale     43,005,000      
Fair Value, Measurements, Recurring | Asset-backed securities | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale     0      
Fair Value, Measurements, Recurring | Asset-backed securities | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale     43,005,000      
Fair Value, Measurements, Recurring | Asset-backed securities | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Securities available for sale     $ 0