Fair Value Measurements and Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Certain Financial Instruments (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Carrying Amount \| Cash and due from banks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	$ 225,343	$ 181,103
Carrying Amount \| Interest-earning deposits in financial institutions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,592,712	2,126,862
Carrying Amount \| Securities AFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,484,021	2,454,058
Carrying Amount \| Securities HTM
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:		2,308,636
Carrying Amount \| Investment in FRB and FHLB stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	181,352	160,442
Carrying Amount \| Loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	915,171	182,936
Carrying Amount \| Loans and leases HFI, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	23,967,527	24,787,067
Carrying Amount \| Equity investments with readily determinable fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,159	2
Carrying Amount \| Equity warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	3,326	3,437
Carrying Amount \| Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	5,253
Financial Liabilities:	3,617	4,065
Carrying Amount \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,546	4,124
Carrying Amount \| Servicing rights
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	190	17,480
Carrying Amount \| Demand, checking, money market, and savings deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	23,468,565	23,156,094
Carrying Amount \| Time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,652,617	4,687,263
Carrying Amount \| Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	2,460,363	2,063,819
Carrying Amount \| Subordinated debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	573,555	952,740
Carrying Amount \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,406	4,156
Estimate of Fair Value Measurement \| Cash and due from banks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	225,343	181,103
Estimate of Fair Value Measurement \| Interest-earning deposits in financial institutions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,592,712	2,126,862
Estimate of Fair Value Measurement \| Securities AFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,484,021	2,454,058
Estimate of Fair Value Measurement \| Securities HTM
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:		2,246,526
Estimate of Fair Value Measurement \| Investment in FRB and FHLB stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	181,352	160,442
Estimate of Fair Value Measurement \| Loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	915,324	183,083
Estimate of Fair Value Measurement \| Loans and leases HFI, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	22,955,046	23,871,794
Estimate of Fair Value Measurement \| Equity investments with readily determinable fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,159	2
Estimate of Fair Value Measurement \| Equity warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	3,326	3,437
Estimate of Fair Value Measurement \| Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	5,253
Financial Liabilities:	3,617	4,065
Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,546	4,124
Estimate of Fair Value Measurement \| Servicing rights
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	190	19,427
Estimate of Fair Value Measurement \| Demand, checking, money market, and savings deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	23,468,565	23,156,094
Estimate of Fair Value Measurement \| Time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,638,194	4,684,099
Estimate of Fair Value Measurement \| Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	2,459,613	2,069,076
Estimate of Fair Value Measurement \| Subordinated debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	575,837	934,819
Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,406	4,156
Level 1 \| Estimate of Fair Value Measurement \| Cash and due from banks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	225,343	181,103
Level 1 \| Estimate of Fair Value Measurement \| Interest-earning deposits in financial institutions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,592,712	2,126,862
Level 1 \| Estimate of Fair Value Measurement \| Securities AFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	223,475	0
Level 1 \| Estimate of Fair Value Measurement \| Securities HTM
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:		185,088
Level 1 \| Estimate of Fair Value Measurement \| Investment in FRB and FHLB stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Loans and leases HFI, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Equity investments with readily determinable fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	2,159	2
Level 1 \| Estimate of Fair Value Measurement \| Equity warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0
Financial Liabilities:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Servicing rights
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Demand, checking, money market, and savings deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	275,185
Level 1 \| Estimate of Fair Value Measurement \| Subordinated debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 1 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Cash and due from banks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Interest-earning deposits in financial institutions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Securities AFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,253,646	2,451,688
Level 2 \| Estimate of Fair Value Measurement \| Securities HTM
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:		2,057,189
Level 2 \| Estimate of Fair Value Measurement \| Investment in FRB and FHLB stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	181,352	160,442
Level 2 \| Estimate of Fair Value Measurement \| Loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	915,324	183,083
Level 2 \| Estimate of Fair Value Measurement \| Loans and leases HFI, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	20,168	48,401
Level 2 \| Estimate of Fair Value Measurement \| Equity investments with readily determinable fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Equity warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	5,253
Financial Liabilities:	3,617	4,065
Level 2 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	4,546	4,124
Level 2 \| Estimate of Fair Value Measurement \| Servicing rights
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 2 \| Estimate of Fair Value Measurement \| Demand, checking, money market, and savings deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	23,468,565	23,156,094
Level 2 \| Estimate of Fair Value Measurement \| Time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,638,194	4,684,099
Level 2 \| Estimate of Fair Value Measurement \| Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	2,349,250	1,680,257
Level 2 \| Estimate of Fair Value Measurement \| Subordinated debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	575,837	934,819
Level 2 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	4,406	4,156
Level 3 \| Estimate of Fair Value Measurement \| Cash and due from banks
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Interest-earning deposits in financial institutions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Securities AFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	6,900	2,370
Level 3 \| Estimate of Fair Value Measurement \| Securities HTM
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:		4,249
Level 3 \| Estimate of Fair Value Measurement \| Investment in FRB and FHLB stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Loans and leases HFI, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	22,934,878	23,823,393
Level 3 \| Estimate of Fair Value Measurement \| Equity investments with readily determinable fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Equity warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	3,326	3,437
Level 3 \| Estimate of Fair Value Measurement \| Cash flow hedges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0
Financial Liabilities:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Servicing rights
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets:	190	19,427
Level 3 \| Estimate of Fair Value Measurement \| Demand, checking, money market, and savings deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Time deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	110,363	113,634
Level 3 \| Estimate of Fair Value Measurement \| Subordinated debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	0	0
Level 3 \| Estimate of Fair Value Measurement \| Interest rate and foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities:	$ 0	$ 0

Fair Value Measurements and Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Certain Financial Instruments (Details) - Recurring - USD ($)
$ in Thousands