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Loans and Leases - Nonaccrual Loans and Leases by Loan Portfolio Segment and Class (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 117,070		$ 104,886	$ 117,070	$ 104,886	$ 62,527
Financing Receivable, Nonaccrual, Interest Income	49		104	53	107
Loans held for investment, net	23,228,909		22,258,210	23,228,909	22,258,210	25,489,687
Leased equipment depreciation	7,511	$ 7,520	9,088	15,031	18,463
Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	23,111,839			23,111,839		25,427,160
Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	95,264		100,817	95,264	100,817	47,730
Financing Receivable, Nonaccrual, Interest Income	4		104	8	107
Loans held for investment, net	13,573,600		14,288,042	13,573,600	14,288,042	16,111,985
Real Estate Mortgage | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	13,478,336			13,478,336		16,064,255
Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Loans held for investment, net	3,357,597		2,465,523	3,357,597	2,465,523	3,159,269
Real Estate Construction and Land | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	3,357,597			3,357,597		3,159,269
Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	21,006		3,864	21,006	3,864	13,986
Financing Receivable, Nonaccrual, Interest Income	45		0	45	0
Loans held for investment, net	5,871,809		5,094,786	5,871,809	5,094,786	5,765,307
Commercial | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	5,850,803			5,850,803		5,751,321
Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	800		205	800	205	811
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Loans held for investment, net	425,903		409,859	425,903	409,859	453,126
Consumer | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	425,103			425,103		452,315
Finance Receivable Allowance | Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	800		205	800	205
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
No Finance Receivable Allowance | Consumer
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Financing Receivable, Nonaccrual, No Allowance	0		0	0	0
Commercial | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	62,498			62,498		15,669
Financing Receivable, Nonaccrual, No Allowance	62,288		37,134	62,288	37,134
Loans held for investment, net	4,722,585			4,722,585		5,026,497
Commercial | Real Estate Mortgage | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	4,660,087			4,660,087		5,010,828
Commercial | Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	210		57	210	57
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Commercial | No Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	4		104	8	107
Multi-Family Real Estate Loans | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	934			934		1,020
Financing Receivable, Nonaccrual, No Allowance	934		0	934	0
Loans held for investment, net	5,984,930			5,984,930		6,025,179
Multi-Family Real Estate Loans | Real Estate Mortgage | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	5,983,996			5,983,996		6,024,159
Multi-Family Real Estate Loans | Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Multi-Family Real Estate Loans | No Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Other Residential Real Estate | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	31,832			31,832		31,041
Financing Receivable, Nonaccrual, No Allowance	31,549		63,230	31,549	63,230
Loans held for investment, net	2,866,085			2,866,085		5,060,309
Other Residential Real Estate | Real Estate Mortgage | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	2,834,253			2,834,253		5,029,268
Other Residential Real Estate | Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	283		396	283	396
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Other Residential Real Estate | No Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0			0		0
Financing Receivable, Nonaccrual, No Allowance	0		0	0	0
Loans held for investment, net	784,166			784,166		759,585
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	784,166			784,166		759,585
Commercial Real Estate Construction Loan Receivable | Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Commercial Real Estate Construction Loan Receivable | No Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0			0		0
Financing Receivable, Nonaccrual, No Allowance	0		0	0	0
Loans held for investment, net	2,573,431			2,573,431		2,399,684
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	2,573,431			2,573,431		2,399,684
Residential Real Estate Construction Financing Receivable | Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0		0
Leased equipment depreciation	0
Residential Real Estate Construction Financing Receivable | No Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Venture Capital Loans | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0			0		325
Financing Receivable, Nonaccrual, No Allowance	0		0	0	0
Loans held for investment, net	1,456,122			1,456,122		1,446,362
Venture Capital Loans | Commercial | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	1,456,122			1,456,122		1,446,037
Venture Capital Loans | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Venture Capital Loans | No Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Other Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	11,211		2,741	11,211	2,741
Other Commercial | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	12,925			12,925		10,972
Loans held for investment, net	2,446,974			2,446,974		2,129,860
Other Commercial | Commercial | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	2,434,049			2,434,049		2,118,888
Other Commercial | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,714		738	1,714	738
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Other Commercial | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	45		0	45	0
Asset Based [Member] | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	8,081			8,081		2,689
Financing Receivable, Nonaccrual, No Allowance	8,081		385	8,081	385
Loans held for investment, net	1,968,713			1,968,713		2,189,085
Asset Based [Member] | Commercial | Performing
Financing Receivable, Nonaccrual [Line Items]
Loans held for investment, net	1,960,632			1,960,632		$ 2,186,396
Asset Based [Member] | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0		0	0	0
Financing Receivable, Nonaccrual, Interest Income	0		0	0	0
Asset Based [Member] | No Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	$ 0		$ 0	$ 0	$ 0

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Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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