Loans and Leases Held for Investment and Credit Quality - Schedule of Amortized Cost Basis of Collateral-Dependent Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	$ 11,307,752	$ 9,934,609
Collateral Dependent Loans, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	100,241	167,295
Collateral Dependent Loans, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	98,149	69,615
Unguaranteed Portion, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	27,802	41,394
Unguaranteed Portion, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	11,061	24,472
Unguaranteed Portion
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	1,200	14,537
Commercial & Industrial \| Collateral Dependent Loans, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	15,540	107,694
Commercial & Industrial \| Collateral Dependent Loans, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	15,540	6,693
Commercial & Industrial \| Collateral Dependent Loans, Real Estate \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	101,001
Commercial & Industrial \| Collateral Dependent Loans, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	98,149	63,288
Commercial & Industrial \| Collateral Dependent Loans, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	3,658	36,500
Commercial & Industrial \| Collateral Dependent Loans, Business Assets \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	94,491	26,788
Commercial & Industrial \| Unguaranteed Portion, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	5,040	16,442
Commercial & Industrial \| Unguaranteed Portion, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	5,040	2,738
Commercial & Industrial \| Unguaranteed Portion, Real Estate \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	13,704
Commercial & Industrial \| Unguaranteed Portion, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	11,061	23,411
Commercial & Industrial \| Unguaranteed Portion, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	145	12,061
Commercial & Industrial \| Unguaranteed Portion, Business Assets \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	10,916	11,350
Commercial & Industrial \| Unguaranteed Portion
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	673	12,673
Commercial & Industrial \| Unguaranteed Portion \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	73	8,299
Commercial & Industrial \| Unguaranteed Portion \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	600	4,374
Commercial Real Estate \| Collateral Dependent Loans, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	84,701	53,306
Commercial Real Estate \| Collateral Dependent Loans, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	79,131	53,306
Commercial Real Estate \| Collateral Dependent Loans, Real Estate \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	5,570
Commercial Real Estate \| Collateral Dependent Loans, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	6,327
Commercial Real Estate \| Collateral Dependent Loans, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	6,327
Commercial Real Estate \| Collateral Dependent Loans, Business Assets \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0
Commercial Real Estate \| Unguaranteed Portion, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	22,762	22,239
Commercial Real Estate \| Unguaranteed Portion, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	22,246	22,239
Commercial Real Estate \| Unguaranteed Portion, Real Estate \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	516
Commercial Real Estate \| Unguaranteed Portion, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	1,061
Commercial Real Estate \| Unguaranteed Portion, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0	1,061
Commercial Real Estate \| Unguaranteed Portion, Business Assets \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable	0
Commercial Real Estate \| Unguaranteed Portion
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	527	890
Commercial Real Estate \| Unguaranteed Portion \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	527	890
Commercial Real Estate \| Unguaranteed Portion \| Commercial Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses	$ 0
Commercial Land \| Collateral Dependent Loans, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		6,295
Commercial Land \| Collateral Dependent Loans, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		6,295
Commercial Land \| Collateral Dependent Loans, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		0
Commercial Land \| Collateral Dependent Loans, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		0
Commercial Land \| Unguaranteed Portion, Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		2,713
Commercial Land \| Unguaranteed Portion, Real Estate \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		2,713
Commercial Land \| Unguaranteed Portion, Business Assets
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		0
Commercial Land \| Unguaranteed Portion, Business Assets \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases receivable		0
Commercial Land \| Unguaranteed Portion
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses		974
Commercial Land \| Unguaranteed Portion \| Small Business Banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for Credit Losses		$ 974

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