Loans and Leases (Details 2) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	$ 103,778	$ 61,174
Loans held for investment, net	28,609,129	22,941,548
Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	87,781	39,832
Loans held for investment, net	15,243,612	11,178,720
Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	10,621	4,715
Loans held for investment, net	4,638,884	3,437,127
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	5,210	16,213
Loans held for investment, net	8,281,962	7,868,051
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	166	414
Loans held for investment, net	444,671	457,650
Performing Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	28,505,351	22,880,374
Performing Financing Receivable [Member] | Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	15,155,831	11,138,888
Performing Financing Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	4,628,263	3,432,412
Performing Financing Receivable [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	8,276,752	7,851,838
Performing Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	444,505	457,236
Asset Based [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	865	1,464
Loans held for investment, net	5,140,209	4,075,477
Asset Based [Member] | Performing Financing Receivable [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	5,139,344	4,074,013
Venture Capital Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	0	2,799
Loans held for investment, net	2,033,302	2,320,593
Venture Capital Loans [Member] | Performing Financing Receivable [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	2,033,302	2,317,794
Other Commercial [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	4,345	11,950
Loans held for investment, net	1,108,451	1,471,981
Other Commercial [Member] | Performing Financing Receivable [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	1,104,106	1,460,031
Commercial Real Estate Construction Loan Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	0	0
Loans held for investment, net	898,592	832,591
Commercial Real Estate Construction Loan Receivable [Member] | Performing Financing Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	898,592	832,591
Residential Real Estate Construction Financing Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	10,621	4,715
Loans held for investment, net	3,740,292	2,604,536
Residential Real Estate Construction Financing Receivable [Member] | Performing Financing Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	3,729,671	2,599,821
Commercial Real Estate [Member] | Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	42,509	27,540
Loans held for investment, net	3,846,831	3,762,299
Commercial Real Estate [Member] | Performing Financing Receivable [Member] | Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	3,804,322	3,734,759
Residential Real Estate [Member] | Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	45,272	12,292
Loans held for investment, net	11,396,781	7,416,421
Residential Real Estate [Member] | Performing Financing Receivable [Member] | Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Loans held for investment, net	$ 11,351,509	$ 7,404,129