Fair Value Measurement and Fair Value of Financial Instruments - Financial Assets and Liabilities Measurement on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale debt securities
Fair Value	$ 5,906,090	$ 9,965,353
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Total investments in tax credit and other investments	725,254	628,263
Derivative
Derivative assets - Fair value	881,404	484,184
Net derivative assets	275,447	383,231
Derivative liabilities - Fair value	1,029,601	390,171
Net derivative liabilities	790,395	157,444
U.S. Treasury securities
Available-for-sale debt securities
Fair Value	600,677	1,032,681
U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	260,424	1,301,971
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	521,885	1,228,980
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	1,793,429	2,928,283
Municipal securities
Available-for-sale debt securities
Fair Value	249,502	523,158
Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	397,975	496,443
Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	671,538	881,931
Corporate debt securities
Available-for-sale debt securities
Fair Value	529,565	649,665
Foreign government bonds
Available-for-sale debt securities
Fair Value	225,810	257,733
Asset-backed securities
Available-for-sale debt securities
Fair Value	64,870	74,558
Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	590,415	589,950
Fair Value, Measurements, Recurring
Available-for-sale debt securities
Fair Value	5,906,090	9,965,353
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	23,837	26,604
Total investments in tax credit and other investments	23,837	26,604
Derivative
Derivative assets - Fair value	881,404	484,184
Netting adjustments	(605,957)	(100,953)
Net derivative assets	275,447	383,231
Derivative liabilities - Fair value	1,029,601	390,171
Netting adjustments	(239,206)	(232,727)
Net derivative liabilities	790,395	157,444
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative
Derivative assets - Fair value	430,038	240,222
Derivative liabilities - Fair value	615,327	179,962
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative
Derivative assets - Fair value	81,874	21,033
Derivative liabilities - Fair value	64,049	15,501
Fair Value, Measurements, Recurring | Equity contracts
Derivative
Derivative assets - Fair value	346	220
Fair Value, Measurements, Recurring | Credit contracts
Derivative
Derivative liabilities - Fair value	27	141
Fair Value, Measurements, Recurring | Commodity contracts
Derivative
Derivative assets - Fair value	369,146	222,709
Derivative liabilities - Fair value	350,198	194,567
Fair Value, Measurements, Recurring | U.S. Treasury securities
Available-for-sale debt securities
Fair Value	600,677	1,032,681
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise debt securities
Available-for-sale debt securities
Fair Value	260,424	1,301,971
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	521,885	1,228,980
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	1,793,429	2,928,283
Fair Value, Measurements, Recurring | Municipal securities
Available-for-sale debt securities
Fair Value	249,502	523,158
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	397,975	496,443
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	671,538	881,931
Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities
Fair Value	529,565	649,665
Fair Value, Measurements, Recurring | Foreign government bonds
Available-for-sale debt securities
Fair Value	225,810	257,733
Fair Value, Measurements, Recurring | Asset-backed securities
Available-for-sale debt securities
Fair Value	64,870	74,558
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	590,415	589,950
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale debt securities
Fair Value	600,677	1,032,681
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	19,637	22,130
Total investments in tax credit and other investments	19,637	22,130
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	600,677	1,032,681
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	5,305,413	8,932,672
Equity Securities, FV-NI and with Readily Determinable Fair Value [Abstract]
Equity securities	4,200	4,474
Total investments in tax credit and other investments	4,200	4,474
Derivative
Derivative assets - Fair value	881,059	483,969
Netting adjustments	(605,957)	(100,953)
Net derivative assets	275,102	383,016
Derivative liabilities - Fair value	1,029,601	390,171
Netting adjustments	(239,206)	(232,727)
Net derivative liabilities	790,395	157,444
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate contracts
Derivative
Derivative assets - Fair value	430,038	240,222
Derivative liabilities - Fair value	615,327	179,962
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange contracts
Derivative
Derivative assets - Fair value	81,874	21,033
Derivative liabilities - Fair value	64,049	15,501
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity contracts
Derivative
Derivative assets - Fair value	1	5
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Credit contracts
Derivative
Derivative liabilities - Fair value	27	141
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commodity contracts
Derivative
Derivative assets - Fair value	369,146	222,709
Derivative liabilities - Fair value	350,198	194,567
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	260,424	1,301,971
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	521,885	1,228,980
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	1,793,429	2,928,283
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities
Available-for-sale debt securities
Fair Value	249,502	523,158
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency commercial mortgage-backed securities
Available-for-sale debt securities
Fair Value	397,975	496,443
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency residential mortgage-backed securities
Available-for-sale debt securities
Fair Value	671,538	881,931
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Available-for-sale debt securities
Fair Value	529,565	649,665
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign government bonds
Available-for-sale debt securities
Fair Value	225,810	257,733
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Available-for-sale debt securities
Fair Value	64,870	74,558
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Collateralized loan obligations (“CLOs”)
Available-for-sale debt securities
Fair Value	590,415	589,950
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	345	215
Netting adjustments	0	0
Net derivative assets	345	215
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	345	215
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