Permanent Equity (Schedule Of Unrestricted Common Stock Activity) (Details) - shares	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Balance, Shares			15,017,219	14,809,705	11,552,551
Issuance of shares			212,121	186,342	2,935,506
Issuance as equity-based compensation			153,471	158,438	408,079
Vesting of shares/restricted units				132,450	90,135
Shares withheld for employee taxes				(37,458)	(71,583)
Retirement of common stock	(100,000)	(100,000)
Forfeiture / cancellation of restricted stock			(32,258)	(32,258)	(104,983)
Repurchase and retirement of common stock			(2,000,000)	(200,000)
Balance, Shares	15,017,219		13,350,553	15,017,219	14,809,705
Institutional Financial Markets, Inc. [Member]
Class of Stock [Line Items]
Vesting of shares/restricted units				132,450	90,135
Restricted Stock [Member]
Class of Stock [Line Items]
Balance, Shares			158,438	411,126	757,826
Issuance of shares			212,121
Issuance as equity-based compensation			153,471	158,438	408,079
Vesting of shares/restricted units			(176,338)	(378,868)	(649,796)
Forfeiture / cancellation of restricted stock			(32,258)	(32,258)	(104,983)
Balance, Shares	158,438		315,434	158,438	411,126
Common Stock [Member]
Class of Stock [Line Items]
Balance, Shares			14,858,781	14,398,579	10,794,725
Issuance of shares				186,342	2,935,506
Vesting of shares/restricted units			176,338	511,318	739,931
Shares withheld for employee taxes				(37,458)	(71,583)
Repurchase and retirement of common stock			(2,000,000)	(200,000)
Balance, Shares	14,858,781		13,035,119	14,858,781	14,398,579

Represents the number of shares from equity based awards that vested during the period.

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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.

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Units that were previously issued and have been repurchased during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Number of shares related to Restricted Stock Award forfeited during the period.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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