Fair Value Measurement and Fair Value of Financial Instruments - Financial Assets and Liabilities Measurement on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Total investments in tax credit and other investments	$ 741,354	$ 763,256
Derivative
Derivative assets - Fair value	627,402	755,328
Net derivative assets	262,275	140,545
Derivative liabilities - Fair value	681,830	887,264
Net derivative liabilities	511,981	644,519
Fair Value, Measurements, Recurring
Available-for-sale debt securities
Fair Value	6,300,868	6,034,993
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	24,421	23,954
Total investments in tax credit and other investments	24,421	23,954
Derivative
Derivative assets - Fair value	627,402	755,328
Netting adjustments	(365,127)	(614,783)
Net derivative assets	262,275	140,545
Derivative liabilities - Fair value	681,830	887,264
Netting adjustments	(169,849)	(242,745)
Net derivative liabilities	511,981	644,519
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative
Derivative assets - Fair value	415,000	440,283
Derivative liabilities - Fair value	462,411	584,516
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative
Derivative assets - Fair value	34,050	53,109
Derivative liabilities - Fair value	32,791	44,117
Fair Value, Measurements, Recurring | Equity contracts
Derivative
Derivative assets - Fair value	277	323
Fair Value, Measurements, Recurring | Credit contracts
Derivative
Derivative liabilities - Fair value	29	23
Fair Value, Measurements, Recurring | Commodity contracts
Derivative
Derivative assets - Fair value	178,075	261,613
Derivative liabilities - Fair value	186,599	258,608
Fair Value, Measurements, Recurring | U.S. Treasury securities
Available-for-sale debt securities
Fair Value	916,982	606,203
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	463,860	461,607
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	497,115	500,269
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	1,772,082	1,762,195
Fair Value, Measurements, Recurring | Municipal securities
Available-for-sale debt securities
Fair Value	266,015	257,099
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	396,723	398,329
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	638,409	649,224
Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities
Fair Value	516,253	526,274
Fair Value, Measurements, Recurring | Foreign government bonds
Available-for-sale debt securities
Fair Value	185,883	227,053
Fair Value, Measurements, Recurring | Asset-backed securities
Available-for-sale debt securities
Fair Value	46,307	49,076
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	601,239	597,664
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale debt securities
Fair Value	916,982	606,203
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	20,204	19,777
Total investments in tax credit and other investments	20,204	19,777
Derivative
Derivative assets - Fair value	0	0
Netting adjustments	0	0
Net derivative assets	0	0
Derivative liabilities - Fair value	0	0
Netting adjustments	0	0
Net derivative liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity contracts
Derivative
Derivative assets - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Credit contracts
Derivative
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Available-for-sale debt securities
Fair Value	916,982	606,203
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government bonds
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Available-for-sale debt securities
Fair Value	5,383,886	5,428,790
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	4,217	4,177
Total investments in tax credit and other investments	4,217	4,177
Derivative
Derivative assets - Fair value	627,125	755,005
Netting adjustments	(365,127)	(614,783)
Net derivative assets	261,998	140,222
Derivative liabilities - Fair value	681,830	887,264
Netting adjustments	(169,849)	(242,745)
Net derivative liabilities	511,981	644,519
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate contracts
Derivative
Derivative assets - Fair value	415,000	440,283
Derivative liabilities - Fair value	462,411	584,516
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	34,050	53,109
Derivative liabilities - Fair value	32,791	44,117
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity contracts
Derivative
Derivative assets - Fair value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Credit contracts
Derivative
Derivative liabilities - Fair value	29	23
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commodity contracts
Derivative
Derivative assets - Fair value	178,075	261,613
Derivative liabilities - Fair value	186,599	258,608
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	463,860	461,607
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	497,115	500,269
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	1,772,082	1,762,195
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities
Available-for-sale debt securities
Fair Value	266,015	257,099
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	396,723	398,329
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	638,409	649,224
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Available-for-sale debt securities
Fair Value	516,253	526,274
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign government bonds
Available-for-sale debt securities
Fair Value	185,883	227,053
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Available-for-sale debt securities
Fair Value	46,307	49,076
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	601,239	597,664
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Available-for-sale debt securities
Fair Value	0	0
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	0	0
Total investments in tax credit and other investments	0	0
Derivative
Derivative assets - Fair value	277	323
Netting adjustments	0	0
Net derivative assets	277	323
Derivative liabilities - Fair value	0	0
Netting adjustments	0	0
Net derivative liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Derivative
Derivative assets - Fair value	277	323
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Credit contracts
Derivative
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign government bonds
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Asset-backed securities
Available-for-sale debt securities
Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	$ 0	$ 0