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Fair Value Measurements - General Disclosures (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | $ 2,261,187 | $ 1,648,257
Equity securities | 5,530 | 5,952
Loans held for sale, at fair value | 42,813 | 68,699
U.S. Treasury securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 27,837 | 51,737
Obligations of U.S. government corporations and agencies |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 69,519 | 163,000
Obligations of states and political subdivisions |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 304,711 | 268,291
Commercial mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 418,616 | 139,287
Residential mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 1,368,315 | 921,966
Corporate debt securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 72,189 | 103,976
Recurring basis |  |
Financial assets and financial liabilities measured at fair value |  |
Equity securities | 5,530 | 5,952
Loans held for sale, at fair value | 42,813 | 68,699
Recurring basis | Derivative assets |  |
Financial assets and financial liabilities measured at fair value |  |
Derivative asset | 33,918 | 13,400
Recurring basis | Derivative liabilities |  |
Financial assets and financial liabilities measured at fair value |  |
Derivative liability | 38,403 | 14,821
Recurring basis | U.S. Treasury securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 27,837 | 51,737
Recurring basis | Obligations of U.S. government corporations and agencies |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 69,519 | 163,000
Recurring basis | Obligations of states and political subdivisions |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 304,711 | 268,291
Recurring basis | Commercial mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 418,616 | 139,287
Recurring basis | Residential mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 1,368,315 | 921,966
Recurring basis | Corporate debt securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 72,189 | 103,976
Recurring basis | Level 2 |  |
Financial assets and financial liabilities measured at fair value |  |
Equity securities | 5,530 | 5,952
Loans held for sale, at fair value | 42,813 | 68,699
Recurring basis | Level 2 | Derivative assets |  |
Financial assets and financial liabilities measured at fair value |  |
Derivative asset | 33,918 | 13,400
Recurring basis | Level 2 | Derivative liabilities |  |
Financial assets and financial liabilities measured at fair value |  |
Derivative liability | 38,403 | 14,821
Recurring basis | Level 2 | U.S. Treasury securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 27,837 | 51,737
Recurring basis | Level 2 | Obligations of U.S. government corporations and agencies |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 69,519 | 163,000
Recurring basis | Level 2 | Obligations of states and political subdivisions |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 304,711 | 268,291
Recurring basis | Level 2 | Commercial mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 418,616 | 139,287
Recurring basis | Level 2 | Residential mortgage-backed securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | 1,368,315 | 921,966
Recurring basis | Level 2 | Corporate debt securities |  |
Financial assets and financial liabilities measured at fair value |  |
Debt securities available for sale | $ 72,189 | $ 103,976

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