Allowance for credit losses on unfunded lending commitments.

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- Definition

Collateralized loan portfolio.

+ References

No definition available.

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- Definition

Due from related parties noncurrent.

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No definition available.

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- Definition

Financial receivable allowance for credit loss reserve

+ References

No definition available.

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- Definition

Loan pledged as collateral.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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- Definition

Amount of expense related to credit loss from transactions other than loan and lease transactions.

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Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 328,900		$ 328,900		$ 502,199
Accrued interest receivable	103,600		103,600		$ 90,700
Provision for credit losses	$ 7,926	$ 8,316	$ 26,999	$ 28,664
Collateralized loan portfolio	974.00%		974.00%		971.00%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans held for sale	$ 328,900		$ 328,900		$ 502,200
Federal Reserve Discount Window [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	4,100,000		4,100,000		3,100,000
Residential Real Estate [Member] \| Asset Pledged as Collateral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	9,200,000		9,200,000		8,600,000
Location, Statement of Income, Balance [Axis]: us-gaap:NoninterestIncomeOtherOperatingIncome
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gains (losses) recognized from sale of loans	(3,200)	(1,600)	(6,300)	(6,500)
Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on unfunded lending commitments			1,000
Allowance for credit losses	7,300	8,800	26,600	29,200
Provision for credit losses	7,900	8,300	27,000	28,700
Accounting Standards Update 2016-13 [Member] \| Unfunded Commitment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on unfunded lending commitments	600	$ 500	1,400	$ 600
Stifel Bancorp [Member] \| Executive Officers and Directors of Certain Affiliated Entities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 124,300		$ 124,300		$ 98,400