Fair Value Measurements - General Disclosures (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	$ 2,744,646	$ 3,981,251
Equity securities	11,264	13,571
Less loans held for sale	4,813	23,875
U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	147,140	165,762
Obligations of U.S. government corporations and agencies
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	29,839	38,470
Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	287,612	306,869
Asset-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	468,129	492,186
Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	98,362	614,998
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	1,441,157	2,069,313
Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	272,407	293,653
Recurring basis
Financial assets and financial liabilities measured at fair value
Equity securities	11,264
Less loans held for sale		23,875
Recurring basis \| Derivative assets
Financial assets and financial liabilities measured at fair value
Derivative asset	25,129	20,314
Recurring basis \| Derivative liabilities
Financial assets and financial liabilities measured at fair value
Derivative liability	43,074	21,501
Recurring basis \| U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	147,140	165,762
Recurring basis \| Obligations of U.S. government corporations and agencies
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	29,839	38,470
Recurring basis \| Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	287,612	306,869
Recurring basis \| Asset-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	468,129	492,186
Recurring basis \| Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	98,362	614,998
Recurring basis \| Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	1,441,157	2,069,313
Recurring basis \| Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	272,407	293,653
Recurring basis \| Securities Equity Investments [Member]
Financial assets and financial liabilities measured at fair value
Equity securities		13,571
Recurring basis \| Level 2
Financial assets and financial liabilities measured at fair value
Equity securities	11,264
Less loans held for sale		23,875
Recurring basis \| Level 2 \| Derivative assets
Financial assets and financial liabilities measured at fair value
Derivative asset	25,126	20,314
Recurring basis \| Level 2 \| Derivative liabilities
Financial assets and financial liabilities measured at fair value
Derivative liability	43,074	21,501
Recurring basis \| Level 2 \| U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	147,140	165,762
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	29,839	38,470
Recurring basis \| Level 2 \| Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	287,612	306,869
Recurring basis \| Level 2 \| Asset-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	468,129	492,186
Recurring basis \| Level 2 \| Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	98,362	614,998
Recurring basis \| Level 2 \| Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	1,441,157	2,069,313
Recurring basis \| Level 2 \| Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	272,407	293,653
Recurring basis \| Level 2 \| Securities Equity Investments [Member]
Financial assets and financial liabilities measured at fair value
Equity securities		$ 13,571
Recurring basis \| Level 3 \| Derivative assets
Financial assets and financial liabilities measured at fair value
Derivative asset	$ 3

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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