Acquisition of KBW, Inc. (Aggregate Merger Consideration Payable) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended
Feb. 15, 2013
Acquisition of KBW, Inc.
Cash paid to KBW, Inc. shareholders	$ 253,039
Common stock issued to KBW, Inc. shareholders	262,653
Fair value of outstanding KBW restricted awards exchanged for Stifel restricted awards	86,221
Purchase price to be allocated	$ 601,913

Business Acquisition Fair Value of Outstanding Acquiree Restricted Awards Exchanged For Acquirer Restricted

No definition available.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

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-Name Accounting Standards Codification

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-SubTopic 30

-Section 30

-Paragraph 8

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

+ References

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

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