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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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-Publisher FASB

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

Number of new stock issued during the period.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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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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Permanent Equity (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended			9 Months Ended							12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2013 Additional paid-in capital [Member]	Sep. 30, 2012 Additional paid-in capital [Member]	Sep. 30, 2013 Non-controlling Interest [Member]	Sep. 30, 2012 Non-controlling Interest [Member]	Sep. 30, 2013 JVB [Member] Restricted Stock [Member]	Dec. 31, 2011 JVB [Member] Restricted Stock [Member]
Permanent Equity [Line Items]
Acquisition / (surrender) of additional units of consolidated subsidiary, net				$ (124)	$ (27)	$ 2,705	$ 804	$ (2,581)	$ (777)
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		186,342	372,681
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period											559,020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period										186,339
Shares issued in connection with the redemption of Operating LLC units	186,339
Issuance of common stock	2,749,167									186,339