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, 2025	Dec. 31, 2024
Affordable housing partnership, tax credit and CRA investments, net:
Total affordable housing partnership, tax credit and CRA investments, net	$ 969,492	$ 926,640
Derivative assets:
Derivative assets - Fair value	409,467	523,133
Net derivative assets	151,942	95,841
Derivative liabilities - Fair value	385,973	545,885
Net derivative liabilities	284,333	433,601
Fair Value	13,212,220	10,846,811
Government National Mortgage Association (GNMA)
Derivative assets:
Fair Value	9,600,000	7,200,000
U.S. Treasury securities
Derivative assets:
Fair Value	993,913	638,265
U.S. government agency and U.S. government sponsored enterprise debt securities
Derivative assets:
Fair Value	257,654	262,587
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Derivative assets:
Fair Value	265,338	426,214
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Derivative assets:
Fair Value	10,132,653	7,738,260
Municipal securities
Derivative assets:
Fair Value	243,102	250,153
Non-agency commercial mortgage-backed securities
Derivative assets:
Fair Value	190,948	258,470
Non-agency residential mortgage-backed Securities
Derivative assets:
Fair Value	393,787	433,608
Corporate debt securities
Derivative assets:
Fair Value	464,981	526,166
Foreign government bonds
Derivative assets:
Fair Value	238,455	233,880
Asset-backed securities
Derivative assets:
Fair Value	31,389	34,715
Collateralized loan obligations (“CLOs”)
Derivative assets:
Fair Value		44,493
Fair Value, Measurements, Recurring
AFS debt securities:
Fair Value	13,212,220	10,846,811
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	26,396	25,021
Total affordable housing partnership, tax credit and CRA investments, net	26,396	25,021
Other assets:
Equity securities	630	568
Total other assets	630	568
Derivative assets:
Derivative assets - Fair value	409,467	523,133
Netting adjustments	(257,525)	(427,292)
Net derivative assets	151,942	95,841
Derivative liabilities - Fair value	385,973	545,885
Netting adjustments	(101,640)	(112,284)
Net derivative liabilities	284,333	433,601
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	298,558	385,311
Derivative liabilities - Fair value	256,870	414,172
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	44,340	89,083
Derivative liabilities - Fair value	43,160	71,254
Fair Value, Measurements, Recurring | Credit contracts
Derivative assets:
Derivative assets - Fair value	25	1
Derivative liabilities - Fair value	51	12
Fair Value, Measurements, Recurring | Equity contracts
Derivative assets:
Derivative assets - Fair value	522	239
Derivative liabilities - Fair value	13,734	15,119
Fair Value, Measurements, Recurring | Commodity contracts
Derivative assets:
Derivative assets - Fair value	66,022	48,499
Derivative liabilities - Fair value	72,158	45,328
Fair Value, Measurements, Recurring | U.S. Treasury securities
AFS debt securities:
Fair Value	993,913	638,265
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise debt securities
AFS debt securities:
Fair Value	257,654	262,587
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	265,338	426,214
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	10,132,653	7,738,260
Fair Value, Measurements, Recurring | Municipal securities
AFS debt securities:
Fair Value	243,102	250,153
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	190,948	258,470
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	393,787	433,608
Fair Value, Measurements, Recurring | Corporate debt securities
AFS debt securities:
Fair Value	464,981	526,166
Fair Value, Measurements, Recurring | Foreign government bonds
AFS debt securities:
Fair Value	238,455	233,880
Fair Value, Measurements, Recurring | Asset-backed securities
AFS debt securities:
Fair Value	31,389	34,715
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value		44,493
Fair Value, Measurements, Recurring | Level 1
AFS debt securities:
Fair Value	993,913	638,265
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	22,098	20,817
Total affordable housing partnership, tax credit and CRA investments, net	22,098	20,817
Other assets:
Equity securities	630	568
Total other assets	630	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	993,913	638,265
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
Fair Value, Measurements, Recurring | Level 2
AFS debt securities:
Fair Value	12,218,307	10,208,546
Affordable housing partnership, tax credit and CRA investments, net:
Equity securities	4,298	4,204
Total affordable housing partnership, tax credit and CRA investments, net	4,298	4,204
Other assets:
Equity securities	0	0
Total other assets	0	0
Derivative assets:
Derivative assets - Fair value	408,945	522,894
Netting adjustments	(257,525)	(427,292)
Net derivative assets	151,420	95,602
Derivative liabilities - Fair value	372,239	530,766
Netting adjustments	(101,640)	(112,284)
Net derivative liabilities	270,599	418,482
Fair Value, Measurements, Recurring | Level 2 | Interest rate contracts
Derivative assets:
Derivative assets - Fair value	298,558	385,311
Derivative liabilities - Fair value	256,870	414,172
Fair Value, Measurements, Recurring | Level 2 | Foreign exchange contracts
Derivative assets:
Derivative assets - Fair value	44,340	89,083
Derivative liabilities - Fair value	43,160	71,254
Fair Value, Measurements, Recurring | Level 2 | Credit contracts
Derivative assets:
Derivative assets - Fair value	25	1
Derivative liabilities - Fair value	51	12
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	66,022	48,499
Derivative liabilities - Fair value	72,158	45,328
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	257,654	262,587
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	265,338	426,214
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	10,132,653	7,738,260
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
AFS debt securities:
Fair Value	243,102	250,153
Fair Value, Measurements, Recurring | Level 2 | Non-agency commercial mortgage-backed securities
AFS debt securities:
Fair Value	190,948	258,470
Fair Value, Measurements, Recurring | Level 2 | Non-agency residential mortgage-backed Securities
AFS debt securities:
Fair Value	393,787	433,608
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities
AFS debt securities:
Fair Value	464,981	526,166
Fair Value, Measurements, Recurring | Level 2 | Foreign government bonds
AFS debt securities:
Fair Value	238,455	233,880
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
AFS debt securities:
Fair Value	31,389	34,715
Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations (“CLOs”)
AFS debt securities:
Fair Value		44,493
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	0
Total other assets	0	0
Derivative assets:
Derivative assets - Fair value	522	239
Netting adjustments	0	0
Net derivative assets	522	239
Derivative liabilities - Fair value	13,734	15,119
Netting adjustments	0	0
Net derivative liabilities	13,734	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	522	239
Derivative liabilities - Fair value	13,734	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