Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Stifel Financial Corp. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk-weighted assets, Actual Amount	$ 1,238,545
Total capital to risk-weighted assets, For Capital Adequacy Purposes Amount	36,635
Total capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	457,981
Tier 1 capital to risk-weighted assets, Actual Amount	1,225,212
Tier 1 capital to risk-weighted assets, For Capital Adequacy Purposes Amount	183,192
Tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	27,478
Tier 1 capital to adjusted average total assets, Actual Amount	1,225,212
Tier 1 capital to adjusted average total assets, For Capital Adequacy Purposes Amount	316,822
Tier 1 capital to adjusted average total assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	396,028
Total capital to risk-weighted assets, Actual Ratio	27.00%
Total capital to risk-weighted assets, For Capital Adequacy Purposes Ratio	8.00%
Total capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%
Tier 1 capital to risk-weighted assets, Actual Ratio	26.80%
Tier 1 capital to risk-weighted assets, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%
Tier 1 capital to adjusted average total assets, Actual Ratio	15.50%
Tier 1 capital to adjusted average total assets, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 capital to adjusted average total assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%
Stifel Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk-weighted assets, Actual Amount	357,056
Total capital to risk-weighted assets, For Capital Adequacy Purposes Amount	216,976
Total capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	271,221
Tier 1 capital to risk-weighted assets, Actual Amount	344,388
Tier 1 capital to risk-weighted assets, For Capital Adequacy Purposes Amount	108,488
Tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	162,732
Tier 1 capital to adjusted average total assets, Actual Amount	344,388
Tier 1 capital to adjusted average total assets, For Capital Adequacy Purposes Amount	195,048
Tier 1 capital to adjusted average total assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 243,811
Total capital to risk-weighted assets, Actual Ratio	13.20%
Total capital to risk-weighted assets, For Capital Adequacy Purposes Ratio	8.00%
Total capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%
Tier 1 capital to risk-weighted assets, Actual Ratio	12.70%
Tier 1 capital to risk-weighted assets, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%
Tier 1 capital to adjusted average total assets, Actual Ratio	7.10%
Tier 1 capital to adjusted average total assets, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 capital to adjusted average total assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%