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Fair Value Measurements (Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets | $ 110,734 |  | $ 6,908 |
Derivative liabilities | 32,601 |  | 22,244 |
Total recurring fair value measurements - liabilities | 1,900 |  | 4,100 |
Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale debt securities | 5,556,041 |  | 6,986,698 |
Mortgage loans held for sale | 10,843 |  | 41,022 |
Derivative assets | 109,497 | [1] | 75,867 | [2]
Total fair value measurements | 5,676,381 |  | 7,103,587 |
Derivative liabilities | 204,121 | [1] | 35,046 | [2]
Total recurring fair value measurements - liabilities | 204,121 |  | 35,046 |
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 | 110,865 |  | 419,298 |
Recurring [Member] | Municipal Obligations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale debt securities | 203,092 |  | 314,158 |
Recurring [Member] | Corporate Debt Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale debt securities | 21,080 |  | 18,702 |
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 | 2,256,986 |  | 3,035,798 |
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 | 2,893,430 |  | 3,077,859 |
Recurring [Member] | Collateralized Mortgage Obligations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale debt securities | 70,588 |  | 120,883 |
Recurring [Member] | Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale debt securities | 5,556,041 |  | 6,986,698 |
Mortgage loans held for sale | 10,843 |  | 41,022 |
Derivative assets | 109,497 | [1] | 75,867 | [2]
Total fair value measurements | 5,676,381 |  | 7,103,587 |
Derivative liabilities | 202,238 | [1] | 30,930 | [2]
Total recurring fair value measurements - liabilities | 202,238 |  | 30,930 |
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 | 110,865 |  | 419,298 |
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 | 203,092 |  | 314,158 |
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 | 21,080 |  | 18,702 |
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 | 2,256,986 |  | 3,035,798 |
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 | 2,893,430 |  | 3,077,859 |
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 | 70,588 |  | 120,883 |
Recurring [Member] | Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative liabilities | 1,883 | [1] | 4,116 | [2]
Total recurring fair value measurements - liabilities | $ 1,883 |  | $ 4,116 |
[1] | (1) For further disaggregation of derivative assets and liabilities, see Note 11 – Derivatives.
[2] | (1) For further disaggregation of derivative assets and liabilities, see Note 11 – Derivatives.

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