Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 636,115	$ 24,632	$ 648,665	$ 230,962
Sales	$ 523,436	$ 20,438	$ 523,436	$ 34,719
Purchase price as a percentage of loans outstanding	85.10%	98.90%	85.50%	98.20%
Net gain on sale of loans	$ 400	$ 1,500	$ 400	$ 3,600
Loss on sale of capital call lines of credit	5,037	0	5,037	0
Specialty lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	631,252	0	631,252	0
Sales	287,185	0	287,185	0
Loss on sale of capital call lines of credit			5,000
Capital calls lines of credit			670,000
Specialty lending | Loans Held-for-Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit			280,700
Specialty lending | Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit			389,300
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	4,863	0	10,308	0
Sales	47,358	14,040	47,358	22,880
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	2,867	0
Sales	18,851	3,519	18,851	8,960
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	8,081	4,238	154,955
Personal installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	16,551	0	76,007
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	2,879	0	2,879
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	16,000	0	16,000	0
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 154,042	$ 0	$ 154,042	$ 0