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Borrowings and Federal Home Loan Bank Advances (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) item
Short-term Debt [Line Items] |
Uncommitted secured lines of credit | $ 1,000,000,000
Number of banks | item | 6
Daily borrowings under our uncommitted secured lines | $ 391,000,000
Compensating balances | 0
Federal home loan advances, floating-rate | $ 540,000,000
Stifel Bancorp [Member] |
Short-term Debt [Line Items] |
Notes maturity year | 2043
Notes payable | $ 124,500,000
Revolving Credit Facility [Member] |
Short-term Debt [Line Items] |
Committed revolving credit facility with bank and broker dealer - subsidiary | $ 200,000,000
Credit facility expiration date | 2020-03
LIBOR rate | 2.00%
Outstanding credit facility | $ 0
Stifel Credit Facility [Member] |
Short-term Debt [Line Items] |
Committed revolving credit facility with bank and broker dealer - subsidiary | $ 250,000,000
Credit facility expiration date | 2019-06
Outstanding credit facility | $ 0
Credit agreement maturity days | 364 days
Company Owned Securities [Member] |
Short-term Debt [Line Items] |
Uncommitted secured lines of credit | $ 56,000,000
Trading securities pledged | $ 63,000,000
Federal Home Loan Bank advances [Member] |
Short-term Debt [Line Items] |
Weighted average interest rate on borrowings | 1.61%

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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