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Debentures To Stifel Financial Capital Trusts (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Jun. 28, 2008 | Mar. 30, 2007 | Aug. 12, 2005
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debenture to Stifel Financial Capital Trust | $ 67,500 |  | $ 67,500 |  |  |  |
Stated interest rate | 4.25% |  |  |  |  |  |
Maturity date | Dec. 31, 2024 |  |  |  |  |  |
Stifel Financial Capital Trust II [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debenture to Stifel Financial Capital Trust | $ 20,000 | [1] | 20,000 | [1] |  |  | $ 35,000
Stated interest rate | 6.38% |  |  |  |  |  |
Maturity date | Sep. 30, 2035 |  |  |  |  |  |
Earliest call date | Sep. 30, 2010 |  |  |  |  |  |
Interest rate terms, spread over reference rate | 1.70% |  |  |  |  |  |
Reference rate | Three-month LIBOR plus 1.70% per annum |  |  |  |  |  |
Extinguishment of debentures |  |  | 15,000 |  |  |  |
Stifel Financial Capital Trust III [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debenture to Stifel Financial Capital Trust | $ 35,000 | [2] | 35,000 | [2] |  | $ 35,000 |
Stated interest rate | 6.79% |  |  |  |  |  |
Maturity date | Jun. 06, 2037 |  |  |  |  |  |
Earliest call date | Jun. 06, 2012 |  |  |  |  |  |
Interest rate terms, spread over reference rate | 1.85% |  |  |  |  |  |
Reference rate | Three-month LIBOR plus 1.85% per annum |  |  |  |  |  |
Stifel Financial Capital Trust IV [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debenture to Stifel Financial Capital Trust | $ 12,500 | [3] | $ 12,500 | [3] | $ 35,000 |  |
Stated interest rate | 6.78% |  |  |  |  |  |
Maturity date | Sep. 06, 2037 |  |  |  |  |  |
Earliest call date | Sep. 06, 2012 |  |  |  |  |  |
Interest rate terms, spread over reference rate | 1.85% |  |  |  |  |  |
Reference rate | Three-month LIBOR plus 1.85% per annum |  |  |  |  |  |
[1] | On August 12, 2005, we completed a private placement of $35.0 million of 6.38% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust II (the “Trust II”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 30, 2035, but may be redeemed by our company, and in turn, the Trust II would call the debenture beginning September 30, 2010. The Trust II requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.70% per annum. During 2016, we extinguished $15.0 million of the Trust II debentures.
[2] | On March 30, 2007, we completed a private placement of $35.0 million of 6.79% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust III (the “Trust III”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on June 6, 2037, but may be redeemed by our company, and in turn, Trust III would call the debenture beginning June 6, 2012. Trust III requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.
[3] | On June 28, 2007, we completed a private placement of $35.0 million of 6.78% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust IV (the “Trust IV”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 6, 2037, but may be redeemed by our company, and in turn, Trust IV would call the debenture beginning September 6, 2012. Trust IV requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.

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- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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