v3.26.3
Fair Value Measurements - Assets and Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities $ 3,284,350 $ 3,164,756
Equity securities 19,706 19,875
Derivative assets 150,359 105,260
Derivative liabilities 150,503 106,445
Foreclosed assets 963 2,015
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
Equity securities 19,706 19,875
Derivative assets 0 0
Derivative liabilities 0 0
Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 3,099,008 2,898,012
Equity securities 0 0
Derivative assets 160,809 105,734
Derivative liabilities 150,316 108,102
Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Equity securities 0 0
Derivative assets 0 0
Derivative liabilities 0 0
U.S. Treasury obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
U.S. Treasury obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
U.S. Treasury obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
U.S. Treasury obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Government-agency obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 27,206 33,539
Government-agency obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Government-agency obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 27,206 33,539
Government-agency obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Mortgage-backed securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 2,818,445 2,612,347
Mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Mortgage-backed securities | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 2,818,445 2,612,347
Mortgage-backed securities | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Asset-backed securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 34,476 41,761
Asset-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Asset-backed securities | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 34,476 41,761
Asset-backed securities | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
State and municipal obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 103,903 112,999
State and municipal obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
State and municipal obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 103,903 112,999
State and municipal obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Corporate obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 114,978 97,366
Corporate obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Corporate obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 114,978 97,366
Corporate obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis:    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 3,284,350 3,164,756
Equity securities 19,706 19,875
Derivative assets 160,809 105,734
Total assets, fair value disclosure 3,464,865 3,290,365
Derivative liabilities 150,316 108,102
Measured on a recurring basis: | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
Equity securities 19,706 19,875
Derivative assets 0 0
Total assets, fair value disclosure 205,048 286,619
Derivative liabilities 0 0
Measured on a recurring basis: | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 3,099,008 2,898,012
Equity securities 0 0
Derivative assets 160,809 105,734
Total assets, fair value disclosure 3,259,817 3,003,746
Derivative liabilities 150,316 108,102
Measured on a recurring basis: | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Equity securities 0 0
Derivative assets 0 0
Total assets, fair value disclosure 0 0
Derivative liabilities 0 0
Measured on a recurring basis: | U.S. Treasury obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
Measured on a recurring basis: | U.S. Treasury obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 185,342 266,744
Measured on a recurring basis: | U.S. Treasury obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | U.S. Treasury obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Government-agency obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 27,206 33,539
Measured on a recurring basis: | Government-agency obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Government-agency obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 27,206 33,539
Measured on a recurring basis: | Government-agency obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Mortgage-backed securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 2,818,445 2,612,347
Measured on a recurring basis: | Mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Mortgage-backed securities | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 2,818,445 2,612,347
Measured on a recurring basis: | Mortgage-backed securities | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Asset-backed securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 34,476 41,761
Measured on a recurring basis: | Asset-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Asset-backed securities | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 34,476 41,761
Measured on a recurring basis: | Asset-backed securities | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | State and municipal obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 103,903 112,999
Measured on a recurring basis: | State and municipal obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | State and municipal obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 103,903 112,999
Measured on a recurring basis: | State and municipal obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Corporate obligations    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 114,978 97,366
Measured on a recurring basis: | Corporate obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a recurring basis: | Corporate obligations | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 114,978 97,366
Measured on a recurring basis: | Corporate obligations | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total available for sale debt securities 0 0
Measured on a non-recurring basis:    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets, fair value disclosure 125,295 56,521
Loans measured for impairment based on the fair value of the underlying collateral 124,332 54,506
Foreclosed assets 963 2,015
Measured on a non-recurring basis: | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets, fair value disclosure 0 0
Loans measured for impairment based on the fair value of the underlying collateral 0 0
Foreclosed assets 0 0
Measured on a non-recurring basis: | Significant Other Observable  Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets, fair value disclosure 0 0
Loans measured for impairment based on the fair value of the underlying collateral 0 0
Foreclosed assets 0 0
Measured on a non-recurring basis: | Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total assets, fair value disclosure 125,295 56,521
Loans measured for impairment based on the fair value of the underlying collateral 124,332 54,506
Foreclosed assets $ 963 $ 2,015