Investments of Operating Entities and Consolidated Funds - Portfolio Funds (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Investment Holdings [Line Items]
Number of funds	8
Other investments	$ 84,930,000		$ 59,943,000
Operating Entities
Investment Holdings [Line Items]
Other investments	84,930,000		59,943,000
Operating Entities | Portfolio Funds
Investment Holdings [Line Items]
Other investments	55,898,000		40,350,000
Operating Entities | Portfolio Funds | Healthcare Royalty Partners [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	7,866,000	[1],[2]	6,297,000	[1],[2]
Operating Entities | Portfolio Funds | Healthcare Royalty Partners II [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	6,415,000	[1],[2]	1,521,000	[1],[2]
Operating Entities | Portfolio Funds | Ramius Global Credit Fund LP [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	14,196,000	[2],[3]	11,790,000	[2],[3]
Required notice period, redemption	60 days		60 days
Penalty on redemptions of less than one year	4.00%		4.00%
Operating Entities | Portfolio Funds | Ramius Alternative Replication Ltd [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	0	[2],[4]	837,000	[2],[4]
Required notice period, redemption	7 days		7 days
Operating Entities | Portfolio Funds | Tapestry Investment Co PCC Ltd [Member]
Investment Holdings [Line Items]
Other investments	194,000	[5]	185,000	[5]
Operating Entities | Portfolio Funds | Ramius Enhanced Replication Fund LLC [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	0	[2],[6]	337,000	[2],[6]
Required notice period, redemption	7 days		7 days
Operating Entities | Portfolio Funds | Starboard Value and Opportunity Fund LP [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	15,706,000	[2],[7]	11,123,000	[2],[7]
Required notice period, withdrawal	90 days		90 days
Operating Entities | Portfolio Funds | Formation 8 Partners Fund I [Member]
Investment Holdings [Line Items]
Other investments	1,500,000	[8]	0	[8]
Operating Entities | Portfolio Funds | RCG LV Park Lane LLC [Member]
Investment Holdings [Line Items]
Other investments	708,000	[9]	0	[9]
Operating Entities | Portfolio Funds | Other Funds [Member]
Investment Holdings [Line Items]
Other investments	7,826,000	[10]	7,415,000	[10]
Operating Entities | Portfolio Funds | Other Funds [Member] | Affiliated Entity [Member]
Investment Holdings [Line Items]
Other investments	1,487,000	[11],[2]	845,000	[11],[2]
Consolidated Funds
Investment Holdings [Line Items]
Other investments	204,205,000		228,820,000
Consolidated Funds | Portfolio Funds
Investment Holdings [Line Items]
Other investments	190,081,000		221,480,000
Enterprise Master [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	167,147,000		194,070,000
Enterprise Master [Member] | Portfolio Funds | Other Private Investment [Member] | Various Strategies [Member]
Investment Holdings [Line Items]
Other investments	12,430,000		16,580,000
Enterprise Master [Member] | Portfolio Funds | 624 Art Holdings, LLC [Member] | Affiliated Entity [Member] | Artwork Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12]	38,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Longview Equity Fund, LP [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	11,027,000	[12]	14,460,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Longview II, LP [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	970,000	[12]	1,592,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Longview Debt Fund IV, LP [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	30,572,000	[12]	23,594,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Longview, LP [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	265,000	[12]	271,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Soundview, LLC [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	2,374,000	[12]	2,748,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Urban American Real Estate Fund, L.P. [Member] | Affiliated Entity [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	1,987,000	[12]	3,142,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG International Sarl [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments	752,000	[12]	870,000	[12]
Enterprise Master [Member] | Portfolio Funds | Ramius Navigation Fund Ltd [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12]	1,106,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Special Opportunities Fund, Ltd [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments	80,166,000	[12]	97,144,000	[12]
Enterprise Master [Member] | Portfolio Funds | Ramius Credit Opportunities Fund Ltd [Member] | Affiliated Entity [Member] | Distressed Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12]	121,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Endeavour, LLC [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments	43,000	[12]	47,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Energy, LLC [Member] | Affiliated Entity [Member] | Energy Strategy [Member]
Investment Holdings [Line Items]
Other investments	14,239,000	[12]	16,560,000	[12]
Enterprise Master [Member] | Portfolio Funds | RCG Renergys, LLC [Member] | Affiliated Entity [Member] | Energy Strategy [Member]
Investment Holdings [Line Items]
Other investments	1,000	[12]	2,000	[12]
Enterprise Master [Member] | Portfolio Funds | Real Estate Funds [Member] | Real Estate Strategy [Member]
Investment Holdings [Line Items]
Other investments	12,321,000		15,795,000
Enterprise LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	173,348,000		193,012,000
Consolidated Fund of Funds [Member]
Investment Holdings [Line Items]
Number of funds	4		4
Consolidated Fund of Funds [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	16,733,000		28,468,000
Consolidated Fund of Funds [Member] | Portfolio Funds | Ramius Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			8,269,000	[12],[13]
Consolidated Fund of Funds [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			8,883,000	[12],[13]
Consolidated Fund of Funds [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments	1,657,000	[12],[14]	438,000	[12],[14]
Consolidated Fund of Funds [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments	7,161,000	[12],[15]	8,078,000	[12],[15]
Required notice period, redemption	5 days		5 days
Required notice period, redemption, intra-month	3 days		3 days
Intra-month redemption fee	10,000		10,000
Consolidated Fund of Funds [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			260,000	[14]
Consolidated Fund of Funds [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments	7,125,000	[16]	1,992,000	[16]
Consolidated Fund of Funds [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments	790,000	[17]	35,000	[17]
Consolidated Fund of Funds [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			459,000	[18]
Consolidated Fund of Funds [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			54,000	[19]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	1,860,000		3,238,000
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments	315,000	[12],[14]	438,000	[12],[14]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12],[15]	0	[12],[15]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			260,000	[14]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments	1,545,000	[16]	1,992,000	[16]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[17]	35,000	[17]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			459,000	[18]
Ramius Levered Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			54,000	[19]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments			8,269,000
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			8,269,000	[12],[13]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[14]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[15]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[14]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments			0	[16]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[17]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[18]
Ramius Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[19]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments			8,883,000
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			8,883,000	[12],[13]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[14]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[15]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[14]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments			0	[16]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[17]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[18]
Ramius Vintage Multi-Strategy FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[19]
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	2,965,000		7,178,000
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			552,000	[12]
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments	649,000	[12],[14]	901,000	[12]
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12],[15]
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			40,000
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments	2,316,000	[16]	3,015,000
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[17]	1,272,000
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			1,319,000
Ramius Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			79,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	4,747,000		9,600,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12]
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments	693,000	[12],[14]	962,000	[12]
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12],[15]
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			399,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments	3,264,000	[16]	5,044,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments	790,000	[17]	1,753,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			1,442,000
Ramius Vintage Multi-Strategy Master FOF LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			0
RTS Global 3X Fund LP [Member]
Investment Holdings [Line Items]
Number of funds	6
RTS Global 3X Fund LP [Member] | Portfolio Funds
Investment Holdings [Line Items]
Other investments	7,161,000		8,078,000
Derivative asset (liability)	338,000		2,563,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Bond Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	489,000		(2,000)
RTS Global 3X Fund LP [Member] | Portfolio Funds | Commodity Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	47,000		756,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Currency Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	264,000		418,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Energy Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	239,000		2,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Equity Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	(27,000)		0
RTS Global 3X Fund LP [Member] | Portfolio Funds | Index Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	(257,000)		80,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Interest Rate Futures [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	40,000		20,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Commodity Options [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	0		181,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Currency Options [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	0		487,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Foreign Currency Options [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	0		358,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Index Options [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	0		80,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Interest Rate Options [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	0		(25,000)
RTS Global 3X Fund LP [Member] | Portfolio Funds | Commodity Forwards [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	(659,000)		51,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Currency Forwards [Member]
Investment Holdings [Line Items]
Derivative asset (liability)	202,000		157,000
RTS Global 3X Fund LP [Member] | Portfolio Funds | Ramius Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Ramius Vintage Multi-Strategy Master FOF LP [Member] | Affiliated Entity [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[12],[13]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Tapestry Pooled Account V LLC [Member] | Affiliated Entity [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[12],[14]	0	[12],[14]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Independently Advised Portfolio Funds [Member] | Affiliated Entity [Member] | Futures and Global Macro Strategy [Member]
Investment Holdings [Line Items]
Other investments	7,161,000	[12],[15]	8,078,000	[12],[15]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Credit-Based Strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[14]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Event Driven Stategy [Member]
Investment Holdings [Line Items]
Other investments	0	[16]	0	[16]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Hedged Equity Strategy [Member]
Investment Holdings [Line Items]
Other investments	0	[17]	0	[17]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Multi-strategy [Member]
Investment Holdings [Line Items]
Other investments			0	[18]
RTS Global 3X Fund LP [Member] | Portfolio Funds | Externally Managed Portfolio Funds [Member] | Fixed Income Arbitrage Strategy [Member]
Investment Holdings [Line Items]
Other investments			$ 0	[19]

[1] HealthCare Royalty Partners and HealthCare Royalty Partners II are private equity funds and therefore distributions will be made when the underlying investments are liquidated.

[2] These portfolio funds are affiliates of the Company

[3] Ramius Global Credit Fund LP has a quarterly redemption policy with a 60 day notice period and a 4% penalty on redemptions of investments of less than a year in duration.

[4] Ramius Alternative Replication Ltd has monthly redemption policy with a seven day notice period.

[5] Tapestry Investment Company PCC Ltd is in the process of liquidation and redemptions will be made periodically at the investment managers' decision as the underlying investments are liquidated.

[6] Ramius Enhanced Replication Fund LLC has monthly redemption policy with a seven day notice period.

[7] Starboard Value and Opportunity Fund LP permits quarterly withdrawals upon ninety days notice.

[8] Formation 8 Partners Fund I is a private equity fund which invests in equity of early stage and growth transformational IT and energy technology companies. Distributions will be made when the underlying investments are liquidated.

[9] RCG LV Park Lane LLC is a single purpose entity formed to participate in a joint venture which acquired, at a discount, the mortgage notes on a portfolio of multifamily real estate properties located in Birmingham, Alabama. RCG LV Park Lane LLC is a private equity structure and therefore distributions will be made when the underlying investments are liquidated.

[10] Other private investment represents the Company's closed end investment in a wireless broadband communication provider in Italy.

[11] The majority of these funds are real estate fund affiliates of the Company or are managed by the Company and the investors can redeem from these funds as investments are liquidated.

[12] These Portfolio Funds are affiliates of the Company.

[13] Investments held in affiliated master funds can be redeemed on a monthly basis with no advance notice.

[14] The Credit‑Based strategy aims to generate returns via positions in the credit sensitive sphere of the fixed income markets. The strategy generally involves the purchase of corporate bonds with hedging of the interest exposure. The investments held in Tapestry Pooled Account V LLC, a related fund, are held solely in a credit based fund which the underlying fund's manager has placed in a side-pocket. The remaining amount of the investments within this category represents an investment in a fund that is in the process of liquidating. Distributions from this fund will be received as underlying investments are liquidated.

[15] The Futures and Global Macro strategy is comprised of several portfolio accounts, each of which will be advised independently by a commodity trading advisor implementing primarily managed futures or global macro‑based investment strategies. The trading advisors (through their respective portfolio accounts) will trade independently of each other and, as a group, will employ a wide variety of systematic, relative value and discretionary trading programs in the global currency, fixed income, commodities and equity futures markets. In implementing their trading programs, the trading advisors will trade primarily in the futures and forward markets (as well as in related options). Although certain trading advisors may be permitted to use total return swaps and trade other financial instruments from time to time on an interim basis, the primary focus will be on the futures and forward markets. Redemption frequency of these portfolio accounts are monthly (and intra month for a $10,000 fee) and the notification period for redemptions is 5 business days (or 3 business days for intra month redemptions).

[16] The Event Driven strategy is generally implemented through various combinations and permutations of merger arbitrage, restructuring and distressed instruments. The investments in this category are primarily in a side pocket or suspended with undetermined payout dates.

[17] The Hedged Equity strategy focuses on equity strategies with some directional market exposure. The strategy attempts to profit from market efficiencies and direction. The investee fund manager has side-pocketed investments.

[18] The Multi‑Strategy investment objective is to invest discrete pools of its capital among portfolio managers that invest through investment funds, forming multi-strategy, diversified investment portfolios designed to achieve non-market directional returns with low relative volatility. The investments in this category represent investments in a fund that is in the process of liquidating. Distributions from this fund will be received as underlying investments are liquidated.

[19] The Fixed Income Arbitrage strategy seeks to achieve long term capital appreciation by employing a variety of strategies to generate returns without significant exposure to credit spread, interest rate changes or duration. As of December 31, 2012, the investment manager has gated investments.