Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of Financial Assets (Liabilities) Measured At Fair Value On a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Affordable housing partnership, tax credit and CRA investments, net:
Total affordable housing partnership, tax credit and CRA investments, net	$ 926,640	$ 905,036
Derivative assets:
Derivative assets - Fair value	523,133	610,920
Net derivative assets	95,841	298,128
Derivative liabilities - Fair value	545,885	613,314
Net derivative liabilities	433,601	537,144
Fair Value	10,846,811	6,188,337
Government National Mortgage Association (GNMA)
Derivative assets:
Fair Value	7,200,000	1,200,000
U.S. Treasury securities
Derivative assets:
Fair Value	638,265	1,060,375
U.S. government agency and U.S. government sponsored enterprise debt securities
Derivative assets:
Fair Value	262,587	364,446
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Derivative assets:
Fair Value	426,214	468,259
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Derivative assets:
Fair Value	7,738,260	1,727,594
Municipal securities
Derivative assets:
Fair Value	250,153	261,016
Non-agency commercial mortgage-backed securities
Derivative assets:
Fair Value	258,470	367,516
Non-agency residential mortgage-backed Securities
Derivative assets:
Fair Value	433,608	553,671
Corporate debt securities
Derivative assets:
Fair Value	526,166	502,425
Foreign government bonds
Derivative assets:
Fair Value	233,880	227,874
Asset-backed securities
Derivative assets:
Fair Value	34,715	42,300
Collateralized loan obligations (“CLOs”)
Derivative assets:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring
AFS debt securities:
Fair Value	10,846,811	6,188,337
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	25,021	24,659
Total affordable housing partnership, tax credit and CRA investments, net	25,021	24,659
Other assets:
Equity securities	568
Total other assets	568
Derivative assets:
Derivative assets - Fair value	523,133	610,920
Netting adjustments	(427,292)	(312,792)
Net derivative assets	95,841	298,128
Derivative liabilities - Fair value	545,885	613,314
Netting adjustments	(112,284)	(76,170)
Net derivative liabilities	433,601	537,144
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	385,311	473,907
Derivative liabilities - Fair value	414,172	433,936
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	89,083	57,072
Derivative liabilities - Fair value	71,254	42,564
Fair Value, Measurements, Recurring | Credit contracts
Derivative assets:
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	12	25
Fair Value, Measurements, Recurring | Equity contracts
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities - Fair value	15,119	15,119
Fair Value, Measurements, Recurring | Commodity contracts
Derivative assets:
Derivative assets - Fair value	48,499	79,604
Derivative liabilities - Fair value	45,328	121,670
Fair Value, Measurements, Recurring | U.S. Treasury securities
AFS debt securities:
Fair Value	638,265	1,060,375
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	262,587	364,446
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	426,214	468,259
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	7,738,260	1,727,594
Fair Value, Measurements, Recurring | Municipal securities
AFS debt securities:
Fair Value	250,153	261,016
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	258,470	367,516
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	433,608	553,671
Fair Value, Measurements, Recurring | Corporate debt securities
AFS debt securities:
Fair Value	526,166	502,425
Fair Value, Measurements, Recurring | Foreign government bonds
AFS debt securities:
Fair Value	233,880	227,874
Fair Value, Measurements, Recurring | Asset-backed securities
AFS debt securities:
Fair Value	34,715	42,300
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring | Level 1
AFS debt securities:
Fair Value	638,265	1,060,375
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	20,817	20,509
Total affordable housing partnership, tax credit and CRA investments, net	20,817	20,509
Other assets:
Equity securities	568
Total other assets	568
Derivative assets:
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 | Level 1 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Credit contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Equity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities
AFS debt securities:
Fair Value	638,265	1,060,375
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign government bonds
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2
AFS debt securities:
Fair Value	10,208,546	5,127,962
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	4,204	4,150
Total affordable housing partnership, tax credit and CRA investments, net	4,204	4,150
Other assets:
Equity securities	0
Total other assets	0
Derivative assets:
Derivative assets - Fair value	522,894	610,584
Netting adjustments	(427,292)	(312,792)
Net derivative assets	95,602	297,792
Derivative liabilities - Fair value	530,766	598,195
Netting adjustments	(112,284)	(76,170)
Net derivative liabilities	418,482	522,025
Fair Value, Measurements, Recurring | Level 2 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	385,311	473,907
Derivative liabilities - Fair value	414,172	433,936
Fair Value, Measurements, Recurring | Level 2 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	89,083	57,072
Derivative liabilities - Fair value	71,254	42,564
Fair Value, Measurements, Recurring | Level 2 | Credit contracts
Derivative assets:
Derivative assets - Fair value	1	1
Derivative liabilities - Fair value	12	25
Fair Value, Measurements, Recurring | Level 2 | Equity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	48,499	79,604
Derivative liabilities - Fair value	45,328	121,670
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	262,587	364,446
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	426,214	468,259
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	7,738,260	1,727,594
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
AFS debt securities:
Fair Value	250,153	261,016
Fair Value, Measurements, Recurring | Level 2 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	258,470	367,516
Fair Value, Measurements, Recurring | Level 2 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	433,608	553,671
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities
AFS debt securities:
Fair Value	526,166	502,425
Fair Value, Measurements, Recurring | Level 2 | Foreign government bonds
AFS debt securities:
Fair Value	233,880	227,874
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
AFS debt securities:
Fair Value	34,715	42,300
Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	44,493	612,861
Fair Value, Measurements, Recurring | Level 3
AFS debt securities:
Fair Value	0	0
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	0	0
Total affordable housing partnership, tax credit and CRA investments, net	0	0
Other assets:
Equity securities	0
Total other assets	0
Derivative assets:
Derivative assets - Fair value	239	336
Netting adjustments	0	0
Net derivative assets	239	336
Derivative liabilities - Fair value	15,119	15,119
Netting adjustments	0	0
Net derivative liabilities	15,119	15,119
Fair Value, Measurements, Recurring | Level 3 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Credit contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | Equity contracts
Derivative assets:
Derivative assets - Fair value	239	336
Derivative liabilities - Fair value	15,119	15,119
Fair Value, Measurements, Recurring | Level 3 | Commodity contracts
Derivative assets:
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign government bonds
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
AFS debt securities:
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value	$ 0	$ 0