The percentage of fees paid to managing partner.

No definition available.

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- Definition

The amount of management fees paid annually, calculated as a percentage of the investment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of carried interest available to the Management LP after return of all capital contributed by the investors and payment of preferred return to the investors.

+ References

No definition available.

+ Details

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Namespace Prefix:	crbn_
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- Definition

The preferred return payable on the investment following return of original capital.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cost of the investment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Asset Liquidation Investments and Other Investments (Details Textual) (USD $) In Thousands, unless otherwise specified								6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Knight's Bridge Capital Partners Internet Fund No. 1 G P LLC [Member]	Dec. 31, 2011 Knight's Bridge Capital Partners Internet Fund No. 1 G P LLC [Member]	Dec. 31, 2007 Knight's Bridge Capital Partners Internet Fund No. 1 G P LLC [Member]	Jun. 30, 2012 Polaroid [Member]	Dec. 31, 2011 Polaroid [Member]	Jun. 30, 2012 Polaroid [Member] Class D [Member]	Jun. 30, 2012 Polaroid [Member] Class A [Member]	Jun. 30, 2012 Polaroid [Member] Limited Partner [Member]	Jun. 30, 2009 KPL, LLC [Member]	Jun. 30, 2009 Polaroid Corporation [Member]
Non-Asset Liquidation Equity Investment Acquired					$ 20	$ 3,033		$ 606	$ 2,427
Net investment at balance sheet date	2,602	2,772	19	19		2,583	2,753	515	2,068
Total Investment											19,000	55,000
Equity Method Investment, Ownership Percentage					33.33%							5.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest										95.24%
Annual Management Fees on Investment								$ 11	$ 40
Preferred Return on Investment								10.00%	8.00%
Managing Partner, Carried Interest								20.00%	20.00%
Management Fee Percentage								2.00%	2.00%