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Fair Value Measurements (Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 46,120 $ 71,893
Derivative liabilities 36,259 54,707
Total recurring fair value measurements - liabilities 1,300 2,100
Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 5,961,917 5,161,491
Mortgage loans held for sale 33,158 18,929
Derivative assets 63,126 [1] 73,840 [2]
Total fair value measurements 6,058,201 5,254,260
Derivative liabilities 95,367 [1] 160,623 [2]
Total recurring fair value measurements - liabilities 95,367 160,623
Recurring [Member] | U.S. Treasury And Government Agency Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 269,332 182,282
Recurring [Member] | Municipal Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 191,328 196,330
Recurring [Member] | Corporate Debt Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 16,357 17,616
Recurring [Member] | Residential Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 2,375,629 2,129,051
Recurring [Member] | Commercial Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 3,083,325 2,600,965
Recurring [Member] | Collateralized Mortgage Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 25,946 35,247
Recurring [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 5,961,917 5,161,491
Mortgage loans held for sale 33,158 18,929
Derivative assets 63,126 [1] 73,840 [2]
Total fair value measurements 6,058,201 5,254,260
Derivative liabilities 94,083 [1] 158,534 [2]
Total recurring fair value measurements - liabilities 94,083 158,534
Recurring [Member] | Level 2 [Member] | U.S. Treasury And Government Agency Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 269,332 182,282
Recurring [Member] | Level 2 [Member] | Municipal Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 191,328 196,330
Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 16,357 17,616
Recurring [Member] | Level 2 [Member] | Residential Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 2,375,629 2,129,051
Recurring [Member] | Level 2 [Member] | Commercial Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 3,083,325 2,600,965
Recurring [Member] | Level 2 [Member] | Collateralized Mortgage Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 25,946 35,247
Recurring [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 1,284 [1] 2,089 [2]
Total recurring fair value measurements - liabilities $ 1,284 $ 2,089
[1] For further disaggregation of derivative assets and liabilities, see Note 12 – Derivatives.
[2] For further disaggregation of derivative assets and liabilities, see Note 12 – Derivatives.