Fair Value Measurement and Fair Value of Financial Instruments - Financial Assets and Liabilities Measurement on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investments in qualified affordable housing partnerships, tax credit and other investments, net:
Total investments in qualified affordable housing partnerships, tax credit and other investments, net	$ 485,251	$ 350,003
Derivative
Derivative assets - Fair value	610,920	755,328
Net derivative assets	298,128	140,545
Derivative liabilities - Fair Value	613,314	887,264
Net derivative liabilities	537,144	644,519
Fair Value, Measurements, Recurring
Debt securities available-for-sale
Fair Value	6,188,337	6,034,993
Investments in qualified affordable housing partnerships, tax credit and other investments, net:
Equity securities	24,659	23,954
Total investments in qualified affordable housing partnerships, tax credit and other investments, net	24,659	23,954
Derivative
Derivative assets - Fair value	610,920	755,328
Netting adjustments	(312,792)	(614,783)
Net derivative assets	298,128	140,545
Derivative liabilities - Fair Value	613,314	887,264
Netting adjustments	(76,170)	(242,745)
Net derivative liabilities	537,144	644,519
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative
Derivative assets - Fair value	473,907	440,283
Derivative liabilities - Fair Value	433,936	584,516
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative
Derivative assets - Fair value	57,072	53,109
Derivative liabilities - Fair Value	42,564	44,117
Fair Value, Measurements, Recurring | Credit contracts
Derivative
Derivative assets - Fair value	1
Derivative liabilities - Fair Value	25	23
Fair Value, Measurements, Recurring | Equity contracts
Derivative
Derivative assets - Fair value	336	323
Derivative liabilities - Fair Value	15,119
Fair Value, Measurements, Recurring | Commodity contracts
Derivative
Derivative assets - Fair value	79,604	261,613
Derivative liabilities - Fair Value	121,670	258,608
Fair Value, Measurements, Recurring | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	1,060,375	606,203
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	364,446	461,607
Fair Value, Measurements, Recurring | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	468,259	500,269
Fair Value, Measurements, Recurring | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	1,727,594	1,762,195
Fair Value, Measurements, Recurring | Municipal securities:
Debt securities available-for-sale
Fair Value	261,016	257,099
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	367,516	398,329
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	553,671	649,224
Fair Value, Measurements, Recurring | Corporate debt securities
Debt securities available-for-sale
Fair Value	502,425	526,274
Fair Value, Measurements, Recurring | Foreign government bonds
Debt securities available-for-sale
Fair Value	227,874	227,053
Fair Value, Measurements, Recurring | Asset-backed securities
Debt securities available-for-sale
Fair Value	42,300	49,076
Fair Value, Measurements, Recurring | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	612,861	597,664
Fair Value, Measurements, Recurring | Level 1
Debt securities available-for-sale
Fair Value	1,060,375	606,203
Investments in qualified affordable housing partnerships, tax credit and other investments, net:
Equity securities	20,509	19,777
Total investments in qualified affordable housing partnerships, tax credit and other investments, net	20,509	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 | Level 1 | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Credit contracts
Derivative
Derivative assets - Fair value	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Equity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0
Fair Value, Measurements, Recurring | Level 1 | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	1,060,375	606,203
Fair Value, Measurements, Recurring | Level 1 | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities:
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Foreign government bonds
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2
Debt securities available-for-sale
Fair Value	5,127,962	5,428,790
Investments in qualified affordable housing partnerships, tax credit and other investments, net:
Equity securities	4,150	4,177
Total investments in qualified affordable housing partnerships, tax credit and other investments, net	4,150	4,177
Derivative
Derivative assets - Fair value	610,584	755,005
Netting adjustments	(312,792)	(614,783)
Net derivative assets	297,792	140,222
Derivative liabilities - Fair Value	598,195	887,264
Netting adjustments	(76,170)	(242,745)
Net derivative liabilities	522,025	644,519
Fair Value, Measurements, Recurring | Level 2 | Interest rate contracts
Derivative
Derivative assets - Fair value	473,907	440,283
Derivative liabilities - Fair Value	433,936	584,516
Fair Value, Measurements, Recurring | Level 2 | Foreign exchange contracts
Derivative
Derivative assets - Fair value	57,072	53,109
Derivative liabilities - Fair Value	42,564	44,117
Fair Value, Measurements, Recurring | Level 2 | Credit contracts
Derivative
Derivative assets - Fair value	1
Derivative liabilities - Fair Value	25	23
Fair Value, Measurements, Recurring | Level 2 | Equity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Derivative
Derivative assets - Fair value	79,604	261,613
Derivative liabilities - Fair Value	121,670	258,608
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2 | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	364,446	461,607
Fair Value, Measurements, Recurring | Level 2 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	468,259	500,269
Fair Value, Measurements, Recurring | Level 2 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	1,727,594	1,762,195
Fair Value, Measurements, Recurring | Level 2 | Municipal securities:
Debt securities available-for-sale
Fair Value	261,016	257,099
Fair Value, Measurements, Recurring | Level 2 | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	367,516	398,329
Fair Value, Measurements, Recurring | Level 2 | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	553,671	649,224
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities
Debt securities available-for-sale
Fair Value	502,425	526,274
Fair Value, Measurements, Recurring | Level 2 | Foreign government bonds
Debt securities available-for-sale
Fair Value	227,874	227,053
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
Debt securities available-for-sale
Fair Value	42,300	49,076
Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	612,861	597,664
Fair Value, Measurements, Recurring | Level 3
Debt securities available-for-sale
Fair Value	0	0
Investments in qualified affordable housing partnerships, tax credit and other investments, net:
Equity securities	0	0
Total investments in qualified affordable housing partnerships, tax credit and other investments, net	0	0
Derivative
Derivative assets - Fair value	336	323
Netting adjustments	0	0
Net derivative assets	336	323
Derivative liabilities - Fair Value	15,119	0
Netting adjustments	0	0
Net derivative liabilities	15,119	0
Fair Value, Measurements, Recurring | Level 3 | Interest rate contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign exchange contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Credit contracts
Derivative
Derivative assets - Fair value	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Equity contracts
Derivative
Derivative assets - Fair value	336	323
Derivative liabilities - Fair Value	15,119
Fair Value, Measurements, Recurring | Level 3 | Commodity contracts
Derivative
Derivative assets - Fair value	0	0
Derivative liabilities - Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. government agency and U.S. government-sponsored enterprise debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | US government agencies And U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities:
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency commercial mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Non-agency residential mortgage-backed Securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Foreign government bonds
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
Debt securities available-for-sale
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Collateralized loan obligations (“CLOs”)
Debt securities available-for-sale
Fair Value	$ 0	$ 0