Actua (ACTA) 10-Q 12 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 11, 2013
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'ICGE	'
Entity Registrant Name	'ICG GROUP, INC.	'
Entity Central Index Key	'0001085621	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	37,855,653

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current Assets	'	'
Cash and cash equivalents	$58,621	$20,872
Restricted cash	557	408
Accounts receivable, net of allowance ($69-2013;$202-2012)	13,261	8,111
Prepaid expenses and other current assets	3,921	2,630
Assets held for sale / assets of discontinued operations	143,101	229,605
Total current assets	219,461	261,626
Fixed assets, net of accumulated depreciation and amortization ($7,175-2013; $4,527-2012)	6,297	8,069
Marketable securities	'	327
Goodwill	88,989	87,812
Intangibles, net	61,871	61,687
Cost and equity method investments	30,048	26,340
Other assets, net	1,189	1,198
Total Assets	407,855	447,059
Current Liabilities	'	'
Current maturities of long-term debt	5,081	336
Accounts payable	2,146	4,260
Accrued expenses	4,117	2,809
Accrued compensation and benefits	6,214	5,626
Deferred revenue	23,620	16,603
Liabilities held for sale / liabilities of discontinued operations	38,814	63,917
Total current liabilities	79,992	93,551
Long-term debt	7,922	9,645
Deferred revenue	213	179
Other liabilities	1,422	1,269
Total Liabilities	89,549	104,644
Redeemable noncontrolling interest (Note 4)	3,963	3,383
ICG Group, Inc.’s Stockholders’ Equity	'	'
Preferred stock, $0.01 par value; 10,000 shares authorized, none issued or outstanding	'	'
Common stock, $0.001 par value; 2,000,000 shares authorized, 42,437 shares (2013) and 42,155 shares (2012) issued	42	42
Treasury stock, at cost, 4,853 shares (2013) and 4,211 shares (2012)	-36,409	-28,973
Additional paid-in capital	3,555,908	3,549,533
Accumulated deficit	-3,245,866	-3,254,744
Accumulated other comprehensive income	128	40
Total ICG Group, Inc.’s Stockholders’ Equity	273,803	265,898
Noncontrolling Interest	40,540	73,134
Total Equity	314,343	339,032
Total Liabilities, Redeemable noncontrolling interest and Equity	$407,855	$447,059

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified
Accounts receivable, allowance	$69	$202
Accumulated depreciation and amortization	$7,175	$4,527
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	2,000,000	2,000,000
Common stock, shares issued	42,437	42,155
Treasury stock, shares at cost	4,853	4,211

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenue	$16,071		$7,998		$41,521		$17,609
Operating expenses	'		'		'		'
Cost of revenue	4,942		3,144		14,061		7,165
Sales and marketing	7,536		3,803		19,634		8,377
General and administrative	7,984		7,550		24,447		20,631
Research and development	1,611		2,461		5,075		4,901
Amortization of intangible assets	2,176		1,511		6,211		3,318
Impairment related and other	470		654		767		795
Total operating expenses	24,719		19,123		70,195		45,187
Operating income (loss)	-8,648		-11,125		-28,674		-27,578
Other income (loss), net	-68		31,222		-178		32,849
Interest income	63		138		150		325
Interest expense	-370		'		-1,076		'
Income (loss) before income taxes, equity loss and noncontrolling interest	-9,023		20,235		-29,778		5,596
Income tax (expense) benefit	605		732		1,633		2,884
Equity loss	-295	[1]	-1,608	[2]	-1,919	[3]	-7,147	[2]
Income (loss) from continuing operations	-8,713		19,359		-30,064		1,333
Income (loss) from discontinued operations, including gain on sale, net of tax	4,474		1,595		33,991		7,411
Net income (loss)	-4,239		20,954		3,927		8,744
Less: Net income (loss) attributable to the noncontrolling interest	907		387		4,951		-417
Net income (loss) attributable to ICG Group, Inc.	-3,332		21,341		8,878		8,327
Amounts attributable to ICG Group, Inc.:	'		'		'		'
Net income (loss) from continuing operations	-7,516		20,125		-26,809		2,205
Net income (loss) from discontinued operations	4,184		1,216		35,687		6,122
Net income (loss) attributable to ICG Group, Inc.	-3,332		21,341		8,878		8,327
Basic income (loss) per share attributable to ICG Group, Inc.:	'		'		'		'
Income (loss) from continuing operations	($0.21)		$0.57		($0.74)		$0.06
Income (loss) from discontinued operations	$0.12		$0.03		$0.98		$0.17
Net income (loss)	($0.09)		$0.60		$0.24		$0.23
Shares used in computation of basic income (loss) per share	36,303		35,650		36,494		35,907
Diluted income (loss) per share attributable to ICG Group, Inc.:	'		'		'		'
Income (loss) from continuing operations	($0.21)		$0.56		($0.74)		$0.06
Income (loss) from discontinued operations	$0.12		$0.03		$0.98		$0.17
Net income (loss)	($0.09)		$0.59		$0.24		$0.23
Shares used in computation of diluted income (loss) per share	36,303		36,273		36,494		36,435
Net income (loss)	-4,239		20,954		3,927		8,744
Other comprehensive income (loss)	'		'		'		'
Unrealized holding gain (loss) in marketable securities	'		-13		23		1,552
Reclassified adjustments/realized net (gains) loss on marketable securities	'		-106		-23		-1,552
Other accumulated other comprehensive income (loss)	38		-56		88		-47
Comprehensive income (loss)	-4,201		20,779		4,015		8,697
Less: Comprehensive income (loss) attributable to the noncontrolling interest	-869		-443		-4,862		370
Comprehensive income (loss) attributable to ICG Group, Inc.	($3,332)		$21,222		$8,877		$8,327
[1]	Includes Acquirgy, CIML, Freeborders and WhiteFence.
[2]	Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.
[3]	Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)	Total	Common Stock	Treasury Stock at Cost	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (AOCI)	Non- Controlling Interest
In Thousands, except Share data
Beginning balance at Dec. 31, 2011	$253,497	$41	($20,619)	$3,544,121	($3,277,733)	$74	$7,613
Beginning balance (in shares) at Dec. 31, 2011	'	40,729,000	-3,281,000	'	'	'	'
Equity-based compensation expense related to stock appreciation rights (SARs) and stock options	1,887	'	'	1,887	'	'	'
Equity-based compensation expense related to deferred stock units (DSUs)	332	'	'	332	'	'	'
Equity-based compensation expense related to restricted stock (RS)	2,417	'	'	2,417	'	'	'
Issuance of DSUs	223	'	'	223	'	'	'
Issuance of DSUs, shares	'	66,000	'	'	'	'	'
Issuance of RS, net of forfeitures and surrenders	-196	'	'	-196	'	'	'
Issuance of RS, net of forfeitures and surrenders, shares	'	96,000	'	'	'	'	'
Exercise of SARs and stock options, net of surrenders	439	'	'	439	'	'	'
Exercise of SARs and stock options, net of surrenders, shares	56,842	58,000	'	'	'	'	'
Impact of redeemable noncontrolling interest accretion	-345	'	'	-345	'	'	'
Impact of subsidiary equity transactions	32,382	'	'	-3,057	'	'	35,439
Repurchase of common stock	-8,354	'	-8,354	'	'	'	'
Repurchase of common stock, shares	'	'	-930,000	'	'	'	'
Noncontrolling owners share of AOCI of consolidated subsidiary	'	'	'	'	'	-47	47
Net income (loss)	8,876	'	'	'	8,327	'	549
Ending balance at Sep. 30, 2012	291,158	41	-28,973	3,545,821	-3,269,406	27	43,648
Ending balance (in shares) at Sep. 30, 2012	'	40,949,000	-4,211,000	'	'	'	'
Beginning balance at Dec. 31, 2012	339,032	42	-28,973	3,549,533	-3,254,744	40	73,134
Beginning balance (in shares) at Dec. 31, 2012	'	42,155,000	-4,211,000	'	'	'	'
Equity-based compensation expense related to stock appreciation rights (SARs) and stock options	1,801	'	'	1,801	'	'	'
Equity-based compensation expense related to deferred stock units (DSUs)	282	'	'	282	'	'	'
Equity-based compensation expense related to restricted stock (RS)	3,446	'	'	3,446	'	'	'
Issuance of DSUs	262	'	'	262	'	'	'
Issuance of DSUs, shares	'	53,000	'	'	'	'	'
Issuance of RS, net of forfeitures and surrenders	-331	'	'	-331	'	'	'
Issuance of RS, net of forfeitures and surrenders, shares	'	129,000	'	'	'	'	'
Exercise of SARs and stock options, net of surrenders	-709	'	'	-709	'	'	'
Exercise of SARs and stock options, net of surrenders, shares	'	100,000	'	'	'	'	'
Impact of redeemable noncontrolling interest accretion	-675	'	'	-675	'	'	'
Impact of subsidiary equity transactions	2,793	'	'	2,299	'	'	494
Repurchase of common stock	-7,436	'	-7,436	'	'	'	'
Repurchase of common stock, shares	'	'	-642,000	'	'	'	'
Noncontrolling owners share of AOCI of consolidated subsidiary	'	'	'	'	'	88	-88
Net income (loss)	4,022	'	'	'	8,878	'	-4,856
Impact of sale of consolidated subsidiaries	-28,144	'	'	'	'	'	-28,144
Ending balance at Sep. 30, 2013	$314,343	$42	($36,409)	$3,555,908	($3,245,866)	$128	$40,540
Ending balance (in shares) at Sep. 30, 2013	'	42,437,000	-4,853,000	'	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Operating Activities – continuing operations	'		'
Net income (loss)	$3,927		$8,744
(Income) loss from discontinued operations, including gain on sale, net of tax	-33,991		-7,411
Adjustments to reconcile net loss to cash provided by (used in) operating activities:	'		'
Depreciation and amortization	9,722		4,227
Equity-based compensation	6,039		4,676
Impairment related and other	767		795
Other (income) loss	178		-32,849
Equity loss	1,919	[1]	7,147	[2]
Current income tax benefit	-1,899		-2,883
Changes in assets and liabilities, net of effect of acquisitions:	'		'
Accounts receivable, net	-5,507		-2,679
Prepaid expenses and other assets	-1,978		-877
Accounts payable	-2,631		-31
Accrued expenses	126		1,342
Accrued compensation and benefits	387		2,339
Deferred revenue	7,074		8,706
Other liabilities	107		-415
Cash flows provided by (used in) operating activities	-15,760		-9,169
Investing Activities – continuing operations	'		'
Capital expenditures, net	-895		-2,920
Advanced deposits for acquisition of fixed assets	'		-997
Change in restricted cash	-7		-11
Proceeds from sales/distributions of ownership interests	73,469		20,525
Proceeds from sales of marketable securities	760		7,632
Ownership acquisitions, net of cash acquired	-13,287		-59,559
Other investing activities	-241		'
Cash flows provided by (used in) investing activities	59,799		-35,330
Financing Activities – continuing operations	'		'
Acquisition of noncontrolling interest in subsidiary equity	-1,403		-3,484
Borrowings of long-term debt	4,900		1,439
Repayment long-term debt and capital lease obligations	-1,315		-1,409
Payment of deferred and/or contingent acquisition costs	'		'
Purchase of treasury stock	-7,436		-8,354
Tax withholdings related to equity-based awards	-709		-196
Cash received for stock option exercises	'		439
Other financing activities	-79		'
Cash flows provided by (used in) financing activities	-6,042		-11,565
Effect of exchange rates on cash	'		'
Discontinued Operations	'		'
Cash flows provided by (used in) operating activities	6,396		12,419
Cash flows provided by (used in) investing activities	-2,391		-21,822
Cash flows provided by (used in) financing activities	-4,253		9,627
Net increase (decrease) in cash and cash equivalents from discontinued operations	-248		224
Net increase (decrease) in cash and cash equivalents	37,749		-55,840
Cash and cash equivalents at beginning of period	20,872		92,828
Cash and cash equivalents at end of period	$58,621		$36,988
[1]	Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.
[2]	Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.

The_Company

The Company	9 Months Ended
	Sep. 30, 2013
The Company	'
	1. The Company
	Description of the Company
	ICG Group, Inc. (together with its subsidiaries, “ICG”) is a cloud-based software and services company with solutions that improve the productivity and efficiency of businesses worldwide.
	Basis of Presentation
	The Consolidated Financial Statements contained herein (the “Consolidated Financial Statements”) include the accounts of ICG Group, Inc. and its wholly-owned subsidiaries, wholly-controlled subsidiaries and majority-owned subsidiaries. Channel Intelligence, a former subsidiary of CIML, and InvestorForce were previously consolidated core businesses but were sold during the nine months ended September 30, 2013. Accordingly, the financial results and financial position of those companies are presented as discontinued operations in the Consolidated Financial Statements for all periods presented and are excluded from the tables below. Additionally, ICG’s Board of Directors approved the sale of Procurian, also previously a consolidated core business, in the third quarter of 2013. Based on this and other relevant factors, the criteria for assets held for sale / discontinued operations presentation was met prior to September 30, 2013. Accordingly, the financial results and financial position of Procurian are also presented as discontinued operations in the Consolidated Financial Statements for all periods presented and are excluded from the table below.
	ICG’s Consolidated Balance Sheets as of September 30, 2013 and December 31, 2012 included the financial position of the following majority-owned subsidiaries:
	September 30, 2013	December 31, 2012
	Bolt (1)	Bolt (1)
	GovDelivery	CIML (2)
	MSDSonline	GovDelivery
		MSDSonline
	ICG’s Consolidated Statements of Operations and Comprehensive Income (Loss) (its “Consolidated Statements of Operations”) for the three- and nine-month periods ended September 30, 2013 and 2012 included the results of the following majority-owned subsidiaries:
	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
	Bolt (1)	CIML (2)	Bolt (1)	CIML (2)
	GovDelivery	GovDelivery	CIML (2)	GovDelivery
	MSDSonline	MSDSonline	GovDelivery	MSDSonline (3)
			MSDSonline
	(1)              On December 27, 2012, ICG acquired additional equity ownership interests in Bolt that increased ICG’s ownership in the company to 53%; ICG began consolidating the financial position of Bolt as of that date. The results of operations of Bolt from the date of acquisition through December 31, 2012 were immaterial to ICG; accordingly, the results of operations of Bolt are included on ICG’s Consolidated Statements of Operations beginning on January 1, 2013. See Note 4, “Consolidated Core Businesses,” for additional information regarding ICG’s consolidation of Bolt.
	(2)              CIML includes the assets and results of operations of mylist and its subsidiaries that are continuing operations from July 11, 2012, the date of consolidation when ICG increased its ownership in the company to 52%, to February 20, 2013, when ICG’s equity ownership interest in CIML was reduced to 38%.
	(3)              On March 30, 2012, ICG acquired 96% of MSDSonline and began consolidating the financial position of that company as of that date. The results of operations of MSDSonline from the date of acquisition through March 31, 2012 were immaterial to ICG; accordingly, the results of operations of MSDSonline are included on ICG’s Consolidated Statements of Operations beginning on April 1, 2012. See Note 4, “Consolidated Core Businesses,” for additional information regarding ICG’s acquisition of MSDSonline.
	The Consolidated Financial Statements are unaudited and, in the opinion of management, include all adjustments consisting only of normal and recurring adjustments necessary for a fair presentation of the results for these interim periods. The Consolidated Financial Statements should be read in connection with the consolidated financial statements and notes thereto included in ICG’s Annual Report on Form 10-K for the year ended December 31, 2012. Results of operations for the three- and nine-month periods ended September 30, 2013 are not necessarily indicative of the results of operations expected for the full year.

Significant_Accounting_Policie

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Significant Accounting Policies	'
	2. Significant Accounting Policies
	Principles of Accounting for Ownership Interests
	The various interests that ICG acquires in its businesses are accounted for under one of three methods: the consolidation method, the equity method and the cost method. The applicable accounting method is generally determined based on ICG’s voting interest in a company.
	Consolidation. Businesses in which (1) ICG directly or indirectly owns more than 50% of the outstanding voting securities, and (2) other stockholders do not possess the right to affect significant management decisions are generally accounted for under the consolidation method of accounting. Participation of other stockholders in the net assets and in the earnings or losses of a consolidated subsidiary is reflected in the line items “Noncontrolling Interest” in ICG’s Consolidated Balance Sheets and “Net income attributable to the noncontrolling interest” in ICG’s Consolidated Statements of Operations. Noncontrolling interest adjusts ICG’s consolidated results of operations to reflect only ICG’s share of the earnings or losses of the consolidated subsidiary.
	Any changes in ICG’s ownership interest in a consolidated subsidiary, through additional equity issuances by the consolidated subsidiary or through ICG acquiring the shares from existing shareholders, in which ICG maintains control is recognized as an equity transaction, with appropriate adjustments to both ICG’s additional paid-in capital and the corresponding noncontrolling interests. The difference between the carrying amount of ICG’s ownership interest in the company and the underlying net book value of the company after the issuance of stock by the company is reflected as an equity transaction in ICG’s Consolidated Statements of Changes in Equity.
	An increase in ICG’s ownership interest in a business accounted for under the equity or cost method of accounting in which ICG obtains a controlling financial interest is accounted for as a step acquisition, with an allocation of the purchase price to the fair value of the net assets acquired. In addition, ICG remeasures its previously held ownership interest in a business that was previously not consolidated at the acquisition date fair value; any gain or loss resulting from this remeasurement is recognized in ICG’s Consolidated Statements of Operations at that time. ICG begins to include the financial position and operating results of the newly-consolidated subsidiary in its Consolidated Financial Statements from the date ICG obtains the controlling financial interest in that subsidiary. If control is lost, any retained interest is measured at fair value, and a gain or loss is recognized in ICG’s Consolidated Statements of Operations at that time. In addition, to the extent ICG maintains a smaller equity ownership, the accounting method used for that business is adjusted to the equity or cost method of accounting, as appropriate, for subsequent periods.
	Equity Method. Businesses that are not consolidated, but over which ICG exercises significant influence, are accounted for under the equity method of accounting and are referred to in the Notes to Consolidated Financial Statements as “equity method businesses.” The determination as to whether or not ICG exercises significant influence with respect to a company depends on an evaluation of several factors, including, among others, representation on the company’s board of directors and equity ownership level, which is generally between a 20% and a 50% interest in the voting securities of an equity method business, as well as voting rights associated with ICG’s holdings in common stock, preferred stock and other convertible instruments in that company. ICG’s share of the earnings and/or losses of the company, as well as any adjustments resulting from prior period finalizations of equity income/losses, are reflected in the line item “Equity loss” in ICG’s Consolidated Statements of Operations.
	An increase in ICG’s ownership interest in an equity method business over which ICG maintains significant influence is accounted for as a step acquisition, with an allocation of the excess purchase price to the fair value of the net assets acquired. A decrease in ICG’s ownership interest in an equity method business over which ICG maintains significant influence is accounted for as a dilution gain or loss in ICG’s Consolidated Statements of Operations and reflects the difference between ICG’s share of the underlying net assets of that company prior to the relevant change in ownership and ICG’s share of the underlying net assets of that company subsequent to the relevant change in ownership.
	Cost Method. Businesses not accounted for under either the consolidation method or equity method of accounting are accounted for under the cost method of accounting and are referred to in these Notes to Consolidated Financial Statements as “cost method businesses.” ICG’s share of the earnings and/or losses of cost method businesses is not included in ICG’s Consolidated Statement of Operations. However, impairment charges related to cost method businesses are recognized in ICG’s Consolidated Statements of Operations. If circumstances suggest that the value of a cost method business with respect to which an impairment charge has been made has subsequently recovered, that recovery is not recorded. The carrying values of ICG’s cost method businesses are reflected in the line item “Equity and cost method investments” in ICG’s Consolidated Balance Sheets.
	ICG initially records its carrying value in businesses accounted for under the cost method at cost, unless the equity securities of a cost method business have readily determinable fair values based on quoted market prices, in which case the interests are valued at fair value and are classified as marketable securities or some other classification in accordance with guidance for ownership interests in debt and equity securities.
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates. Those estimates include evaluation of ICG’s convertible debt and equity holdings in businesses, holdings in marketable securities, asset impairment, revenue recognition, income taxes and commitments and contingencies. Those estimates and assumptions are based on management’s best judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, such as the current economic environment, that management believes to be reasonable under the circumstances. Management adjusts those estimates and assumptions when facts and circumstances dictate that it is necessary or appropriate to do so. It is reasonably possible that ICG’s accounting estimates with respect to the ultimate recoverability of ICG’s ownership interests in convertible debt and equity holdings, goodwill and the useful lives of intangible assets could change in the near term and that the effect of such changes on ICG’s consolidated financial statements could be material. Management believes the recorded amounts of goodwill, intangible assets, equity method businesses and cost method businesses were not impaired as of September 30, 2013.
	Goodwill, Intangible assets, net, Equity Method Businesses and Cost Method Businesses
	ICG evaluates its carrying value in equity method businesses and cost method businesses continuously to determine whether an other-than-temporary decline in the fair value of any such business exists and should be recognized. In order to make that determination, ICG considers each such business’ achievement of its business plan objectives and milestones, the fair value of its ownership interest in each such business (which, in the case of any company listed on a public stock exchange, is the quoted stock price of the relevant ownership interest), the financial condition and prospects of each such business, and other relevant factors. The business plan objectives and milestones ICG considers include, among others, those related to financial performance, such as achievement of planned financial results or completion of capital raising activities, and those that are not primarily financial in nature, such as obtaining key business partnerships or the hiring of key employees. Impairment charges are determined by comparing ICG’s carrying value of a business with its estimated fair value. Fair value is determined by using a combination of estimating the cash flows related to the relevant asset, including estimated proceeds on disposition, and an analysis of market price multiples of companies engaged in lines of business similar to the company being evaluated. ICG concluded that the carrying value of its equity method businesses and cost method businesses was not impaired as of September 30, 2013 and December 31, 2012.
	ICG tests goodwill for impairment annually during the fourth quarter of each year, or more frequently as conditions warrant, and tests intangible assets for impairment when events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. ICG concluded that its goodwill and intangible assets were not impaired as of September 30, 2013 and December 31, 2012.
	Revenue Recognition
	During the three and nine months ended September 30, 2013, ICG’s consolidated revenue was primarily attributable to Bolt, GovDelivery and MSDSonline. During the three and nine months ended September 30, 2012, ICG’s consolidated revenue was primarily attributable to GovDelivery and MSDSonline. MSDSonline was acquired on March 30, 2012; because the business’ results of operations for the two-day period from March 30, 2012 through March 31, 2012 were immaterial to ICG, revenue related to MSDSonline is included in ICG’s consolidated revenue beginning on April 1, 2012.
	Bolt generates revenue from (1) software licenses, (2) maintenance and support services, (3) professional service fees and (4) insurance commissions. Bolt’s software license revenue derives from licenses of its software products directly to end users and is recognized when persuasive evidence of an arrangement exists, delivery of the product has occurred, no significant obligations with regard to implementation remain, the fee is fixed or determinable and collectability is probable; Bolt’s software license revenue is recognized ratably over the applicable contract term. Bolt’s maintenance and customer support fees are recognized ratably over the life of maintenance and support contracts, which is typically one year. Bolt’s professional service fees revenue relates to professional services for software licenses that require significant customization, integration and installation; that revenue is recognized ratably over the applicable contract term. Finally, Bolt’s commissions on the premiums from sales of insurance policies are recognized when Bolt has sufficient information to determine the amount that is owed, it is probable that the economic benefits associated with the transaction will flow to Bolt, and the costs incurred, or to be incurred, with respect to the transaction can be accurately measured.
	GovDelivery revenue consists of (1) nonrefundable setup fees and (2) monthly maintenance and hosting fees. Those fees generally are deferred and recognized as the services are performed, which is typically over the service term. Costs related to performing setup services are expensed as incurred.
	MSDSonline derives revenue from three sources: (1) subscription fees, (2) professional services fees and (3) compliance solutions project fees. The vast majority of MSDSonline’s revenue is derived from subscription fees from customers accessing the business’ database and web-based tools; that revenue is recognized ratably over the applicable contract term, beginning on the contract implementation date. MSDSonline also generates (a) professional services fees from authoring and/or compiling its customers’ online libraries of material safety data sheet documents and indexing those documents for the customers’ use and (b) fees from training and compliance services projects; the revenue derived from those fees is recognized on a percentage of completion basis over the applicable project’s timeline.
	Net Income (Loss) Per Share
	Basic net income (loss) per share (EPS) is computed using the weighted average number of common shares outstanding during a given period. Diluted EPS includes shares, unless anti-dilutive, that would arise from the exercise of stock options and conversion of other convertible securities and is adjusted, if applicable, for the effect on net income (loss) of such transactions. See Note 13, “Net Income (Loss) per Share.”
	Escrow Information
	When an interest in one of ICG’s businesses is sold, a portion of the sale consideration may be held in escrow primarily to satisfy purchase price adjustments and/or indemnity claims. ICG records gains on escrowed proceeds at the time ICG is entitled to receive such proceeds, the amount is fixed or determinable and realization is assured. As of September 30, 2013, the following amounts related to ICG’s potential proceeds from sales of former consolidated subsidiaries and equity method businesses remained in escrow to satisfy potential or ongoing indemnification claims: (1) $7.9 million of cash related to the sales of InvestorForce and Channel Intelligence, and (2) 11,650 shares of common stock for The Active Network, Inc. (NYSE: ACTV) (“Active”), valued at $0.2 million (based on the stock’s September 30, 2013 closing price) related to the sale of StarCite, Inc. (“StarCite”). Those outstanding escrows are scheduled to be released at various dates within the next two years, subject to pending and potential indemnity claims pursuant to the terms of the specific sales agreements.
	Concentration of Customer Base and Credit Risk
	For both the three and nine months ended September 30, 2013 and 2012, none of the customers of ICG’s businesses represented more than 10% of ICG’s consolidated revenue.
	Commitments and Contingencies
	From time to time, ICG and its businesses are involved in various claims and legal actions arising in the ordinary course of business. ICG does not expect any liability with respect to any legal claims or actions that would materially affect its consolidated financial position or cash flows.
	Reclassifications
	Certain amounts in the prior year financial statements have been reclassified to conform to the current-year presentation. The impact of the reclassifications made to prior year amounts is not material and did not affect net income (loss).
	Discontinued Operations
	During the nine months ended September 30, 2013, InvestorForce and Channel Intelligence (a former subsidiary of CIML) were sold.  Additionally, on October 2, 2013, ICG executed a definitive merger agreement for the sale of Procurian to Accenture. Accordingly, ICG has recast all financial information within this Report to conform to the current period presentation and to present those three businesses as discontinued operations retrospectively for all periods presented.

Goodwill_and_Intangibles_Net

Goodwill and Intangibles, Net	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangibles, net	'
	3. Goodwill and Intangibles, net
	Goodwill
	The following table summarizes the activity related to ICG’s goodwill (in thousands):
		Gross Carrying				Accumulated			Net Carrying
		Amount				Impairment			Amount
						Losses
	Goodwill as of December 31, 2012	$		88,116		$	(304	)	$	87,812
	Estimated increase in goodwill due to preliminary allocation of acquisition price for subsidiary acquisition (Note 4)			1,177			—			1,177
	Goodwill as of September 30, 2013	$		89,293			(304	)	$	88,989
	During the nine months ended September 30, 2013, goodwill related to Procurian was reclassified to the line item, “Assets held for sale / assets of discontinued operations” on ICG’s Consolidated Balance Sheets for all periods presented as a result of the execution of a definitive merger agreement by and among ICG, Procurian and Accenture on October 2, 2013. The impact of the expected sale of Procurian to Accenture is detailed in Note 5, “Discontinued Operations.” Additionally, during the nine months ended September 30, 2013, ICG revised its initial estimates of its allocation of value related to the 2012 consolidation of Bolt. Based on those revisions, ICG retrospectively increased the value of goodwill as of December 31, 2012 by $10.2 million, which was primarily offset by a decrease in intangible assets. During the three months ended September 30, 2013, ICG recorded a decrease to goodwill and Additional paid-in capital of $0.8 million to correct an adjustment that had been recorded during the three months ended June 30, 2013 related to ICG’s revisions of its initial estimates related to the allocated value of Bolt.  The revised allocation of value related to the 2012 consolidation of Bolt is detailed in Note 4, “Consolidated Core Businesses.” Based on the reclassification of goodwill related to Procurian as assets held for sale (which resulted in a decrease to goodwill of $30.2 million), and the revisions to initial estimates related to the allocated value of Bolt (which resulted in an increase to goodwill of $10.2 million), ICG retrospectively decreased the value of goodwill as of December 31, 2012 by $20.0 million.
	During the three and nine months ended September 30, 2013, Bolt acquired Superior Access Insurance Services, Inc. (“Superior Access”).  ICG is in the process of completing its purchase price allocation related to that acquisition and has included an estimate of $1.2 million in its consolidated goodwill as of September 30, 2013.  The preliminary purchase price allocation related to the Superior Access acquisition is detailed in Note 4, “Consolidated Core Businesses.”
	As of September 30, 2013 and December 31, 2012, all of ICG’s goodwill was allocated to its consolidated core businesses.
	Intangible Assets
	The following table summarizes ICG’s intangible assets from continuing operations (in thousands):
					As of September 30, 2013
	Intangible Assets		Useful Life		Gross Carrying					Accumulated				Net Carrying
					Amount					Amortization				Amount
	Customer relationships		2-11 years		$	46,229			$		(7,992	)	$		38,237
	Trademarks/trade names		5-11 years			16,013					(1,965	)			14,048
	Technology		5-10 years			9,131					(1,744	)			7,387
	Non-compete agreements		2-3 years			3,666					(1,867	)			1,799
						75,039					(13,568	)			61,471
	Other intellectual property		Indefinite			400					—				400
					$	75,439			$		(13,568	)	$		61,871
					As of December 31, 2012
	Intangible Assets		Useful Life		Gross Carrying					Accumulated				Net Carrying
					Amount					Amortization				Amount
	Customer relationships		2-11 years		$	40,197			$		(4,961	)	$		35,236
	Trademarks/trade names		5-11 years			14,713					(866	)			13,847
	Technology		5-10 years			10,068					(588	)			9,480
	Non-compete agreements		2-3 years			3,666					(942	)			2,724
						68,644					(7,357	)			61,287
	Other intellectual property		Indefinite			400					—				400
					$	69,044			$		(7,357	)	$		61,687
	Amortization expense for intangible assets during the three- and nine-month periods ended September 30, 2013 was $2.2 million and $6.2 million, respectively. Amortization expense for intangible assets during the three- and nine-month periods ended September 30, 2012 was $1.5 million and $3.3 million, respectively. ICG amortizes intangibles using the straight line method.
	Remaining estimated amortization expense is as follows (in thousands):
	2013	$		2,329
	2014			9,290
	2015			8,317
	2016			7,867
	2017			7,549
	Thereafter			26,119
	Remaining amortization expense	$		61,471
	During the nine months ended September 30, 2013, intangible assets related to Procurian were reclassified to the line item, “Assets held for sale / assets of discontinued operations” on ICG’s Consolidated Balance Sheets for all periods presented as a result of the execution of a definitive merger agreement by and among ICG, Procurian and Accenture on October 2, 2013. The impact of the expected sale of Procurian to Accenture is detailed in Note 5, “Discontinued Operations.” Additionally, as previously disclosed in “Goodwill” in this Note 3, during the nine months ended September 30, 2013, ICG revised its initial estimates related to the allocated value of Bolt in connection with the 2012 consolidation of that company.  Accordingly, based on the reclassification of intangible assets related to Procurian as assets held for sale (which resulted in a decrease to intangible assets of $12.1 million), and the revisions to initial estimates of its allocation of value related to the 2012 consolidation of Bolt (which resulted in a decrease to intangible assets of $10.9 million), ICG retrospectively decreased intangible assets as of December 31, 2012 by $23.0 million.
	Amortization expense for intangible assets recorded in connection with the consolidation of Bolt was $0.6 million and $1.7 million for the three- and nine-month periods ended September 30, 2013, respectively.  The impact on amortization expense for each of the three-month periods ended March 31, 2013, June 30, 2013, and September 30, 2013 related to changes in estimates of ICG’s acquisition accounting for the 2012 consolidation of Bolt and was immaterial to each of those periods.  Amortization recorded for the nine-month period ended September 30, 2013 is based on ICG’s revised allocation of value related to the 2012 Bolt consolidation.
	Impairment
	ICG completes its annual impairment testing in the fourth quarter of each year, or more frequently as conditions warrant. There were no impairment charges related to goodwill or intangible assets associated with ICG’s consolidated subsidiaries during the three- and nine-month periods ended September 30, 2013 and 2012.

Consolidated_Core_Businesses

Consolidated Core Businesses	9 Months Ended
	Sep. 30, 2013
Consolidated Core Businesses	'
	4. Consolidated Core Businesses
	Acquisitions
	During 2012 and 2013, ICG completed the following acquisitions:
	(1) On March 30, 2012, ICG acquired 96% of the equity of MSDSonline. The acquisition was accounted for under the acquisition method. ICG allocated the purchase price to the acquired tangible and identifiable intangible assets and liabilities based upon their respective fair values as of the date of acquisition.
	(2) On December 27, 2012, ICG acquired additional equity ownership interests in Bolt (then an equity method business) for consideration of $13.2 million, increasing ICG’s ownership interest in that business from 38% to 53%. ICG consolidated the financial position of Bolt as of the date the additional equity interests were acquired and accounted for the transaction as a business combination. ICG allocated the value of Bolt to its tangible and identifiable intangible assets and liabilities based upon their respective estimated fair values as of the date of acquisition.
	(3) On August 9, 2013, Bolt acquired Superior Access for $9.0 million in cash.  Bolt has estimated the allocation of purchase price to the acquired tangible and identifiable intangible assets and liabilities based upon their respective estimated fair values at the date of acquisition.  The acquisition accounting related to Bolt’s acquisition of Superior Access is expected to be complete by December 31, 2013.
	The allocations of the purchase price related to the acquisition of MSDSonline and Superior Access and the allocation of the value upon consolidation of Bolt to identified intangible assets and tangible assets and liabilities are as follows (in thousands):
			MSDSonline			Bolt			Superior Access
	Net assets acquired:
	Goodwill	$	15,847		$	68,253		$	1,177
	Customer lists (5-11 year life)		20,440			6,800			5,200
	Trademarks, trade names and domain names (5-11 year life)		6,800			6,400			1,300
	Technology (5 year life)		1,900			4,300			1,300
	Non-compete agreements (3 year life)		3,580			—			—
	Other net assets (liabilities)		1,170			(5,150	)		23
			49,737			80,603			9,000
	Noncontrolling interest (1)		(1,355	)		(31,824	)		—
		$	48,382		$	48,779		$	9,000
	(1)              ICG estimated the fair value of the noncontrolling interest in Bolt and MSDSonline with consideration of discounts for lack of control and lack of marketability. See “Redeemable Noncontrolling Interest” in this Note 4 with respect to MSDSonline.
	Redeemable Noncontrolling Interest
	Certain GovDelivery stockholders have the ability to require GovDelivery to redeem their shares beginning in 2014 based on a fair value determination. Because that redemption is outside the control of GovDelivery, ICG has classified this noncontrolling interest outside of equity and will accrete to its estimated redemption value with an offset to additional paid-in capital. This noncontrolling interest is classified as “Redeemable noncontrolling interest” on ICG’s Consolidated Balance Sheets.
	Certain MSDSonline stockholders have the ability to require MSDSonline to redeem their shares beginning in 2015 based on a fair value determination. Because that redemption is outside the control of MSDSonline, ICG has classified this noncontrolling interest outside of equity and will accrete to its estimated redemption value with an offset to additional paid-in capital. This noncontrolling interest is classified as “Redeemable noncontrolling interest” on ICG’s Consolidated Balance Sheets.
	The following reconciles the activity related to the redeemable noncontrolling interest during the nine months ended September 30, 2013 and 2012 (in thousands):
	Balance at December 31, 2011	$	1,378
	Redeemable noncontrolling interest portion of subsidiary net (income)/loss		(132	)
	Accretion to estimated redemption value		345
	Acquisition of MSDSonline		1,309
	Impact of subsidiary equity transactions		6
	Balance at September 30, 2012	$	2,906
	Balance at December 31, 2012	$	3,383
	Redeemable noncontrolling interest portion of subsidiary net (income)/loss		(95	)
	Accretion to estimated redemption value		675
	Balance at September 30, 2013	$	3,963
	Other Consolidated Businesses Transactions
	Periodically, ICG acquires additional equity ownership interests in its consolidated businesses. Equity ownership interests purchased from a consolidated company’s existing shareholders results in an increase in ICG’s controlling interest in that company and a corresponding decrease in the noncontrolling interest ownership. Those transactions are accounted for as a decrease to “Noncontrolling Interest” and a decrease to “Additional paid-in capital” on ICG’s Consolidated Balance Sheets for the relevant period. ICG may also acquire additional equity ownership interests in its consolidated businesses as a result of share issuances by those companies. An issuance of equity securities by a consolidated business that results in a decrease in ICG’s equity ownership interests is accounted for in accordance with the policy for “Principles of Accounting for Ownership Interests” described in Note 2, “Significant Accounting Policies.” Other changes to ICG’s equity ownership interests in its consolidated core businesses, as well as equity-based compensation award activity at those companies, also result in adjustments to “Additional paid-in capital” and “Noncontrolling Interest” on ICG’s Consolidated Balance Sheets.  The impact of any equity-related transactions at ICG’s consolidated core businesses is included in the line item “Impact of subsidiary equity transactions” on ICG’s Consolidated Statements of Changes in Equity.
	Pro Forma Information
	The information in the following table represents revenue, net income (loss) attributable to ICG Group, Inc. and net income (loss) per diluted share attributable to ICG Group, Inc. for the relative periods, had ICG consolidated MSDSonline and Bolt (including Bolt’s acquisition of Superior Access) in each of those periods.
		Three Months Ended September 30,								Nine Months Ended September 30,
		2013			2012				2013			2012
		(in thousands, except per share data)
	Revenue	$	17.3		$	12.9			$		48.3	$	34.5
	Net income (loss) attributable to ICG Group, Inc.	$	(3.3	)	$	20.9			$		9.0	$	6.3
	Net income (loss) per diluted share attributable to ICG Group, Inc.	$	(0.09	)	$	0.57			$		0.25	$	0.17

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2013
Discontinued Operations	'
	5. Discontinued Operations
	On January 29, 2013, InvestorForce was sold to MSCI for $23.6 million in cash. ICG’s proceeds from the sale were $20.8 million, a portion of which is being held in escrow. ICG recorded a gain of $15.7 million during the nine months ended September 30, 2013 related to the transaction; that gain is included in the line item “Income (loss) from discontinued operations, including gain on sale, net of tax” on ICG’s Consolidated Statements of Operations for the nine-month period ended September 30, 2013. InvestorForce’s results of operations for all periods presented have been presented as discontinued operations on ICG’s Consolidated Statements of Operations. InvestorForce’s revenue was $0.8 million for the period from January 1, 2013 to the date of sale. InvestorForce’s revenue was $2.1 million and $6.3 million for the three and nine months ended September 30, 2012, respectively. ICG’s share of InvestorForce’s net loss for the 2013 period was $0.4 million. ICG’s share of InvestorForce’s net loss for the three and nine months ended September 30, 2012 was $0.3 million and $1.1 million, respectively. The assets and liabilities of InvestorForce as of December 31, 2012 were $3.4 million and $3.9 million, respectively, and are presented on ICG’s Consolidated Balance Sheets for that period in the line items “Assets held for sale / assets of discontinued operations” and “Liabilities held for sale / liabilities of discontinued operations,” respectively. The “Assets held for sale / assets of discontinued operations” as of December 31, 2012 also include $0.7 million of ICG’s goodwill related to InvestorForce.
	On February 20, 2013, Channel Intelligence was sold to Google for $125.0 million in cash, subject to adjustment for working capital and other items. In the transaction, ICG realized $60.5 million, a portion of which is being held in escrow. ICG recorded a gain of $17.8 million during the nine months ended September 30, 2013 related to the transaction that is included in the line item “Income (loss) from discontinued operations, including gain on sale, net of tax” on ICG’s Statements of Operations for the nine-month period ended September 30, 2013. Channel Intelligence’s results of operations for the period from January 1, 2013 to the date of sale have been presented as discontinued operations on ICG’s Consolidated Statements of Operations for the nine months ended September 30, 2013. Channel Intelligence’s revenue for the period from January 1, 2013 to the date of sale was $3.1 million. ICG’s share of Channel Intelligence’s net loss for that period was $2.1 million. Channel Intelligence was included in ICG’s consolidated results beginning on July 11, 2012.  Accordingly, Channel Intelligence’s revenue for the period from July 11, 2012 through September 30, 2012, that was included in ICG’s consolidated results, was $5.1 million. ICG’s share of Channel Intelligence’s net loss for the period from July 11, 2012 through September 30, 2012, that was included in ICG’s consolidated results, was $1.7 million, and included $0.7 million of intangible amortization. Additionally, the assets (excluding goodwill and intangible assets detailed below) and liabilities of Channel Intelligence as of December 31, 2012 were $7.1 million and $6.5 million, respectively, and are included in the line items “Assets held for sale / assets of discontinued operations” and “Liabilities held for sale / liabilities of discontinued operations,” respectively, on ICG’s Consolidated Balance Sheets as of that date. The “Assets held for sale / assets of discontinued operations” at December 31, 2012 also include $48.9 million of ICG’s goodwill and $22.4 million of ICG’s intangible assets (customer relationships of $9.5 million, trademarks/trade names/domain names of $6.7 million, licensing and servicing agreements of $3.5 million and developed technology of $2.7 million) related to ICG’s acquisition accounting for Channel Intelligence.
	On October 2, 2013, ICG executed a definitive merger agreement for the sale of Procurian to Accenture for $375.0 million in cash, subject to certain adjustments at closing, including working capital, cash, debt and other items. Consummation of the transaction is subject to customary closing conditions and is expected to occur in the fourth quarter of 2013. ICG is expected to realize approximately $324 million in connection with the sale. A portion of ICG’s proceeds will be held in escrow and will be subject to potential indemnification claims. ICG does not expect to owe any income taxes in connection with the transaction. ICG’s Board of Directors approved the sale of Procurian in the third quarter of 2013.  Based on this and other relevant factors, the criteria for assets held for sale / discontinued operations presentation was met prior to September 30, 2013.  Accordingly, Procurian’s results of operations for all periods presented have been presented as discontinued operations on ICG’s Consolidated Statements of Operations. Procurian’s revenue was $33.9 million and $103.4 million for the three and nine months ended September 30, 2013, respectively. Procurian’s revenue was $37.5 million and $105.4 million for the three and nine months ended September 30, 2012, respectively. ICG’s share of Procurian’s net income for the three and nine months ended September 30, 2013 was $1.7 million and $4.1 million, respectively. ICG’s share of Procurian’s net income for the three and nine months ended September 30, 2012 was $2.2 million and $7.0 million, respectively. At September 30, 2013, ICG’s Consolidated Balance Sheets line item “Assets held for sale / assets of discontinued operations” include the current assets of Procurian of $71.1 million, non-current assets of Procurian of $14.7 million, goodwill of $30.5 million, intangible assets of $10.9 million and $15.9 million associated with our consolidated deferred tax asset.  The “Liabilities held for sale / liabilities of discontinued operations” on ICG’s Consolidated Balance Sheets at September 30, 2013 include the current liabilities of Procurian of $22.1 million and non-current liabilities of $16.7 million.  At December 31, 2012, the line item “Assets held for sale / assets of discontinued operations” on ICG’s Consolidated Balance Sheets include the current assets of Procurian of $72.8 million, non-current assets of Procurian of $19.5 million, goodwill of $30.5 million, intangible assets of $12.1 million and $12.2 million associated with our consolidated deferred tax asset.  The “Liabilities held for sale / liabilities of discontinued operations” on ICG’s Consolidated Balance Sheets at December 31, 2012 include the current liabilities of Procurian of $30.6 million and non-current liabilities of $22.9 million. An income tax benefit of $0.3 million and income tax expense of $2.0 million is included in the line item "Income (loss) from discontinued operations, including gain on sale, net of tax" on ICG's Consolidated Statements of Operations for the three and nine months ended September 30, 2013, respectively.  Income tax expense of $0.8 million and $3.9 million is included in the line item "Income (loss) from discontinued operations, including gain on sale, net of tax" on ICG's Consolidated Statements of Operations for the three and nine months ended September 30, 2012, respectively.
	In connection with the sales of Channel Intelligence and InvestorForce, ICG received aggregate cash proceeds (excluding amounts held in escrow) of $73.5 million. Consistent with ICG’s policy election, those proceeds are reflected in cash flows provided by investing activities from continuing operations on ICG’s Consolidated Statement of Cash Flows for the nine months ended September 30, 2013.

Equity_and_Cost_Method_Busines

Equity and Cost Method Businesses	9 Months Ended
	Sep. 30, 2013
Equity and Cost Method Businesses	'
	6. Equity and Cost Method Businesses
	Equity Method Businesses
	The following unaudited summarized financial information relates to ICG’s businesses accounted for under the equity method of accounting as of September 30, 2013 and December 31, 2012 and for the three- and nine-month periods ended September 30, 2013 and 2012. This aggregate information has been compiled from the financial statements of those businesses.
	Balance Sheets (Unaudited)
		September 30,			December 31,
		2013 (1)			2012 (2)
		(in thousands)
	Cash and cash equivalents	$	6,017		$	5,572
	Other current assets		12,121			11,268
	Non-current assets		13,193			13,218
	Total assets	$	31,331		$	30,058
	Current liabilities	$	23,327		$	21,115
	Non-current liabilities		6,525			1,397
	Long-term debt		10,194			12,670
	Stockholders’ deficit		(8,715	)		(5,124	)
	Total liabilities and stockholders’ deficit	$	31,331		$	30,058
	Total carrying value	$	14,390		$	13,333
	(1)              Includes (ICG voting ownership): Acquirgy (25%), CIML (38%), Freeborders (31%) and WhiteFence (36%).
	(2)              Includes (ICG voting ownership): Acquirgy (25%), Freeborders (31%) and WhiteFence (36%).
	As of September 30, 2013, ICG’s aggregate carrying value in its equity method businesses exceeded ICG’s share of the net assets of those companies by $16.5 million. Of this excess, $14.3 million is allocated to goodwill, which is not amortized, and $2.2 million is allocated to intangibles, which are generally being amortized over five years. As of December 31, 2012, this excess was $15.3 million, $12.0 million of which was allocated to goodwill, and $3.3 million of which was allocated to intangibles. Amortization expense associated with those intangibles for the three and nine months ended September 30, 2013 was less than $0.1 million and $0.2 million, respectively. Amortization expense associated with those intangibles for the three and nine months ended September 30, 2012 was $0.3 million and $0.9 million, respectively. That amortization expense is included in the table below in the line item “Amortization of intangible assets” and is included in the line item “Equity loss” on ICG’s Consolidated Statements of Operations.
	Results of Operations (Unaudited)
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013 (1)			2012 (2)			2013 (3)				2012 (2)
		(in thousands)
	Revenue	$	15,353		$	16,049		$		40,948		$	75,154
	Net income (loss)	$	(750	)	$	(2,993	)	$		(5,938	)	$	(15,554	)
	Equity income (loss) excluding impairments and amortization of intangible assets	$	(247	)	$	(1,325	)	$		(1,802	)	$	(6,272	)
	Amortization of intangible assets	$	(48	)		(283	)	$		(117	)		(875	)
	Total equity income (loss)	$	(295	)	$	(1,608	)	$		(1,919	)	$	(7,147	)
	(1)              Includes Acquirgy, CIML, Freeborders and WhiteFence.
	(2)              Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.
	(3)              Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.
	Impairments – Equity Method Businesses
	ICG performs ongoing business reviews of its equity method businesses to determine whether ICG’s carrying value in those companies is impaired. ICG determined its carrying value in its equity method businesses was not impaired during the three- and nine-month periods ended September 30, 2013 and 2012.
	Other Equity Method Businesses Information
	During the nine months ended September 30, 2012, ICG participated in a follow-on financing transaction for Bolt. At that time, ICG acquired $9.0 million of Bolt preferred stock; as a result of the transaction, ICG’s ownership in Bolt increased from 26% to 38%. ICG completed a purchase price allocation related to this transaction, which resulted in an allocation of the purchase price to equity method intangible assets that were to be amortized over five years and equity method goodwill, which was not amortized.
	On July 5, 2012, GoIndustry, previously one of ICG’s equity method businesses, was sold. ICG’s portion of the cash proceeds was $2.9 million. During the three-month period ended September 30, 2012, ICG recorded its share of the sale transaction costs incurred by GoIndustry, and, accordingly, ICG’s carrying value of GoIndustry was reduced to zero as of the date of the transaction. ICG recorded a gain of $2.9 million for the proceeds received during the three months ended September 30, 2012, which is included in the line item “Other income (loss)” on ICG’s Consolidated Statements of Operations for the three and nine months ended September 30, 2012. For the three-and nine-month periods ended September 30, 2012, ICG’s share of GoIndustry’s net loss was $0.2 million and $0.7 million, respectively. Those amounts are included in the line item “Equity income (loss) excluding impairments and amortization of intangible assets” in the table above. Following the sale, ICG’s share of GoIndustry’s results was removed from the venture segment and is included in “Dispositions” in the “Results of Operations” segment information table in Note 9, “Segment Information” for all relevant periods presented.
	Marketable Securities
	Marketable securities represent ICG’s holdings of publicly-traded equity securities and are accounted for as available-for-sale securities. On December 30, 2011, StarCite, previously one of ICG’s equity method businesses, was acquired by Active. ICG’s portion of the sale proceeds included shares of Active common stock. During the nine months ended September 30, 2013, ICG sold 150,233 shares of Active common stock at an average price of $5.10 per share for total proceeds of $0.8 million. During the nine months ended September 30, 2012, ICG sold 447,057 shares of Active common stock at an average price of $16.88 per share for total proceeds of $7.5 million. ICG recorded a gain on the sale of those securities of less than $0.1 million and $1.4 million in the nine-month periods ended September 30, 2013 and 2012, respectively. Those gains are included in the line item “Other income (loss), net” on ICG’s Consolidated Statements of Operations for the respective three- and nine-month periods. ICG does not hold any marketable securities as of September 30, 2013. The fair value of the shares of Active common stock held by ICG as of December 31, 2012 of $0.7 million is reflected in both the line item “Marketable Securities” ($0.3 million) and the line item “Prepaid expenses and other current assets” ($0.4 million) on ICG’s Consolidated Balance Sheets.
	During the three and nine months ended September 30, 2012, ICG received 12,989 shares of Intercontinental Exchange, Inc. (“ICE”), representing the final distribution of escrow proceeds related to the disposition of Creditex Group, Inc. ICG recorded a gain in the three and nine months ended September 30, 2012 of $1.7 million based on the closing stock price of the ICE common stock on the day it was released from escrow. Subsequent to the receipt of those shares of ICE common stock, ICG sold the shares and received total proceeds of $1.8 million.  The incremental gain on the sale of those shares of $0.1 million is included in the line item “Other income (loss), net” on ICG’s Consolidated Statement of Operations in the relative period.
	Cost Method Businesses
	ICG’s carrying value of its holdings in cost method businesses was $15.7 million and $13.0 million as September 30, 2013 and December 31, 2012, respectively. Those amounts are reflected in the line item “Cost and equity method investments” on ICG’s Consolidated Balance Sheets as of the relevant dates.
	ICG performs ongoing business reviews of its cost method businesses to determine whether ICG’s carrying value in those companies is impaired. ICG determined its carrying value in its cost method businesses was not impaired during the three- and nine-month periods ended September 30, 2013 and 2012.
	ICG owns approximately 9% of Anthem Ventures Fund, L.P. (formerly eColony, Inc.) and Anthem Ventures Annex Fund, L.P. (collectively, “Anthem”), which invest in technology companies. ICG acquired its interest in Anthem in 2000 and currently has no carrying value in Anthem. Accordingly, the receipt of distributions from Anthem by ICG would result in a gain at the time ICG receives those distributions.

Financial_Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2013
Financial Instruments	'
	7. Financial Instruments
	Fair Value Measurements
	Fair value is the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three levels of inputs that may be used to measure fair value, which are as follows:
	Level 1 – Observable inputs, such as quoted market prices for identical assets and liabilities in active public markets.
	Level 2 – Observable inputs other than Level 1 prices based on quoted prices in markets with insufficient volume or infrequent transactions, or valuations in which all significant inputs are observable for substantially the full term of the asset or liability.
	Level 3 – Unobservable inputs to the valuation techniques that are significant to the fair value of the asset or liability.
	Assets and liabilities are measured at fair value based on one or more of the following three valuation techniques:
	Market Approach – Fair value is determined based on prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities.
	Income Approach – Fair value is determined by converting relevant future amounts to a single present amount, based on market expectations (including present value techniques and option pricing models).
	Cost Approach – Fair value represents the amount that currently would be required to replace the service capacity of the relevant asset (often referred to as replacement cost).
	The fair value hierarchy of ICG’s financial assets measured at fair value on a recurring basis was as follows (in thousands):
		Asset (liability) at		Valuation	Level 1			Level 2			Level 3
		September 30, 2013		Technique
				(Approach)
	Cash equivalents (money market accounts)	$	53,391	Market	$	53,391	$		—	$		—
		$	53,391		$	53,391	$		—	$		—
		Asset (liability) at		Valuation	Level 1			Level 2			Level 3
		December 31,  2012		Technique
				(Approach)
	Cash equivalents (money market accounts and commercial paper investments)	$	13,918	Market	$	13,918	$		—	$		—
		$	13,918		$	13,918	$		—	$		—
	The carrying value of certain of ICG’s other financial instruments, including accounts receivable and accounts payable approximates fair value due to the short-term nature of those instruments.  The fair value of ICG’s long-term debt is based on assumptions concerning the amount and timing of estimated future cash flows and assumed risk-adjusted discount rates.  See Note 8, “Debt” for further discussion.

Debt

Debt	9 Months Ended
	Sep. 30, 2013
Debt	'
	8. Debt
	Long-Term Debt
	ICG’s long-term debt as of September 30, 2013 and December 31, 2012 consisted of the following:
		Interest Rates			September 30,		December 31,
					2013		2012
					(in thousands)
	Term loans and lines of credit	5.50-11.65	%		13,003			9,981
	Current maturities				(5,081	)		(336	)
	Long-term debt			$	7,922		$	9,645
	ICG’s long-term debt matures as follows:
	2013 (remainder of year)	$	1,165
	2014		4,213
	2015		4,695
	2016		2,373
	2017		557
		$	13,003
	Loan and Credit Agreements
	On October 22, 2012, Bolt entered into certain debt agreements with Horizon Technology Ventures Corporation (“Horizon”). Those agreements provide for a term loan of $5.0 million and a $5.0 million line of credit, each of which is subject to an interest rate of 11.65% and matures on May 1, 2016. Those debt instruments have a fair value as of September 30, 2013 and December 31, 2012 of $9.5 million and $9.8 million, respectively, due to warrants issued by Bolt to Horizon in connection with the debt agreement and are included in the line item “Term loans and lines of credit” in the table above. As of September 30, 2013, $5.0 million and $5.0 million are outstanding under the term loan and the line of credit, respectively.
	On August 9, 2013, Bolt entered into certain debt agreements with Neurone II Investments G.P. Ltd. (“Neurone”). Those agreements provide for a term loan of $0.5 million that is subject to an interest rate of 8.0% and matures on August 9, 2014. Those debt instruments have a fair value as of September 30, 2013 of $0.5 million, due to warrants issued by Bolt to Neurone in connection with the debt agreement. As of September 30, 2013, $0.5 million is outstanding under the term loan, which is included in the line item “Term loans and lines of credit” in the table above.
	On November 30, 2012, GovDelivery entered into loan agreements with Venture Bank that provide for a $2.0 million revolving credit facility and a $2.5 million term loan in order to fund GovDelivery’s 2013 initiatives of replacing existing equipment and expanding the company’s data centers. Both the revolving credit facility and the term loan are secured by GovDelivery’s assets and mature on November 30, 2017. Each of the line of credit and the term loan bears interest at a base rate equal to the prime rate plus 2.0% but in no case will be less than 5.5%. There was $0.8 million and $2.3 million outstanding under the line of credit and term loan, respectively, as of September 30, 2013. Those debt instruments have a fair value as of September 30, 2013 of $0.8 million and $2.3 million. There was no amount outstanding under the line of credit as of December 31, 2012; there was $2.5 million outstanding under the term loan as of December 31, 2012. The fair value of the term loan as of December 31, 2012 was $2.4 million. The amounts outstanding for each period are included in the line item “Term loans and lines of credit” in the table above.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Information	'
	9. Segment Information
	ICG has two reporting segments: the “core” segment and the “venture” segment. Businesses in which ICG holds equity or convertible debt interests that are not deemed to be marketable securities are included in either the core or venture segment, while businesses in which ICG holds equity interests that have been designated as marketable securities are considered “corporate” assets.
	The core reporting segment includes those businesses (1) in which ICG’s management takes a very active role in providing strategic direction and operational support and (2) towards which ICG expects to devote relatively large proportions of its personnel, financial capital and other resources. The venture reporting segment includes businesses to which ICG generally devotes less capital, holds relatively smaller ownership stakes and generally has less influence over the strategic directions and management decisions than it does with its core businesses. For the periods presented, the core segment included the results of ICG’s consolidated core businesses, recorded ICG’s share of earnings and losses of its equity core businesses and captured ICG’s carrying value in its consolidated core businesses and equity core businesses. For the periods presented, the venture segment recorded ICG’s share of earnings and losses of venture businesses accounted for under the equity method of accounting and captured ICG’s carrying value in those businesses as well as ICG’s carrying value of its holdings in cost method businesses. For the nine months ended September 30, 2013, the venture segment also recorded the results of ICG’s consolidated venture business.
	During the three and nine months ended September 30, 2013, $0.6 million and $1.8 million, respectively, of ICG’s consolidated revenue relates to sales generated outside of the United States, primarily Europe and Canada. During the three and nine months ended September 30, 2012, $0.2 million and $0.7 million, respectively, of ICG’s consolidated revenue relates to sales generated outside the United States, primarily Europe and Canada. The remaining consolidated revenue for the three- and nine-month periods ended September 30, 2013 and 2012 primarily relates to sales generated in the United States. As of September 30, 2013 and December 31, 2012, ICG’s long-lived assets were located primarily in the United States.
	The following summarizes selected information related to the results of operations of ICG’s segments for the three and nine months ended September 30, 2013 and 2012, as well as the financial position of ICG’s segments as of September 30, 2013 and December 31, 2012. The amounts presented as “Dispositions” in the following table reflect (1) ICG’s share of the results of GoIndustry, which was sold on July 5, 2012, (2) InvestorForce, which was sold on January 29, 2013,  (3) Channel Intelligence, a former subisidiary of CIML, which was sold on February 20, 2013 and (4) Procurian, which entered into an agreement of merger on October 2, 2013. All significant intersegment activity has been eliminated. Assets reflected in each operating segment are owned by a company in that operating segment.
	Segment Information
	(in thousands)
		Core			Venture				Total				Dispositions				Corporate			Other (1)			Consolidated
									Segment														Results
	Three Months Ended September 30, 2013
	Revenue	$	16,071		$	—			$		16,071		$		—		$	—		$	—		$	16,071
	Net income (loss) attributable to ICG Group, Inc.	$	(3,953	)	$	(394	)		$		(4,347	)	$		4,474		$	(4,372	)	$	913		$	(3,332	)
	Three Months Ended September 30, 2012
	Revenue	$	7,384		$	614			$		7,998		$		—		$	—		$	—		$	7,998
	Net income (loss) attributable to ICG Group, Inc.	$	(4,592	)	$	(1,611	)		$		(6,203	)	$		1,399		$	(5,468	)	$	31,613		$	21,341
	Nine Months Ended September 30, 2013
	Revenue	$	41,092		$	429			$		41,521		$		—		$	—		$	—		$	41,521
	Net income (loss) attributable to ICG Group, Inc.	$	(14,114	)	$	(1,883	)		$		(15,997	)	$		33,991		$	(13,970	)	$	4,854		$	8,878
	Nine Months Ended September 30, 2012
	Revenue	$	16,995		$	614			$		17,609		$		—		$	—		$	—		$	17,609
	Net income (loss) attributable to ICG Group, Inc.	$	(13,286	)	$	(2,836	)		$		(16,122	)	$		6,479		$	(14,466	)	$	32,436		$	8,327
	(1)    The following table reflects the components in Other (in thousands):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013			2012				2013				2012
	Corporate other income (loss) (Note 11)	$	6		$	31,226			$		(97	)	$		32,853
	Noncontrolling interest (income) loss		907			387					4,951				(417	)
		$	913		$	31,613			$		4,854		$		32,436
		Core						Venture								Total					Dispositions						Corporate			Other			Consolidated
																Segment																	Results
	Assets as of:
	September 30, 2013	$	198,476			$				16,871				$			215,347			$		143,101				$		49,407	$		—	$		407,855
	December 31, 2012	$	185,160			$				17,822				$			202,982			$		229,605				$		14,472	$		—	$		447,059

EquityBased_Compensation

Equity-Based Compensation	9 Months Ended
	Sep. 30, 2013
Equity-Based Compensation	'
	10. Equity-Based Compensation
	As of September 30, 2013, equity-based compensation awards may be granted to ICG employees, directors and consultants under ICG’s 2005 Omnibus Equity Compensation Plan, as such has been amended from time to time (the “Plan”). Generally, the grants vest over a period from one to four years and expire eight to ten years after the grant date. Most companies in which ICG holds equity ownership interests also maintain their own equity incentive/compensation plans.
	ICG issues the following types of equity-based compensation to its employees and non-employee directors: (1) stock appreciation rights (SARs), (2) stock options, (3) restricted stock and (4) deferred stock units (DSUs). The following table summarizes the equity-based compensation recognized in the respective periods; that equity-based compensation is included in operating expenses, primarily in the line item “General and administrative” on ICG’s Consolidated Statements of Operations.
	Equity-Based Compensation (in thousands, except weighted average years):
		Three Months Ended														Nine Months Ended											Unrecognized						Weighted Average
		September 30,														September 30,											Equity-Based						Years Remaining
																											Compensation						of Equity-Based
																											as of						Compensation as
		2013					2012							2013							2012						September 30, 2013						of September 30, 2013
	SARs	$		599			$		661					$				1,801			$	1,887			$				2,192					1.9
	Restricted Stock			1,020					737									3,446				2,134							6,794					2.3
	DSUs			96					87									282				332							160					0.4
	Equity-Based Compensation			1,715					1,485									5,529				4,353							9,146
	Equity-Based Compensation for Consolidated Core Businesses			165					136									510				323							1,698					2.8
	Equity-Based Compensation	$		1,880			$		1,621					$				6,039			$	4,676			$				10,844
	SARs
	Each SAR represents the right of the holder to receive, upon exercise of that SAR, shares of ICG Common Stock equal to the amount by which the fair market value of a share of that Common Stock on the date of exercise of the SAR exceeds the base price of the SAR. The base price is determined by the NASDAQ closing price of ICG’s Common Stock on the date of grant (or the closing price on the next trading day if there are no trades in ICG’s stock on the date of grant). The fair value of each SAR is estimated on the grant date using the Black-Scholes option-pricing model. SARs generally vest over four years, with 25% vesting on the first anniversary of the grant date, and the remaining 75% vesting ratably each month over the subsequent 36 months.
	Activity with respect to SARs during the three and nine months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013																2012
		Number				Weighted					Weighted								Number				Weighted							Weighted
		of				Average					Average								of SARs				Average							Average
		SARs				Base Price					Fair Value												Base Price							Fair Value
	Granted		—			$		—			$		—							500				$	9.84						$	5.23
	Exercised (1)		220,874			$		7.59			$		4.55							16,000				$	8.41						$	4.96
	Forfeited		—			$		—			$		—							—				$	—						$	—
	(1)              The exercise of SARs listed in this table resulted in the issuance of 55,619 shares of ICG’s Common Stock during the three months ended September 30, 2013.
		Nine Months Ended September 30,
		2013																	2012
		Number				Weighted					Weighted							Number				Weighted			Weighted
		of				Average					Average							of SARs				Average			Average
		SARs				Base Price					Fair Value											Base Price			Fair Value
	Granted		—			$		—			$		—							260,125		$	9.23		$		4.89
	Exercised (1)		376,362			$		12.43			$		7.46							16,000		$	8.41		$		4.96
	Forfeited		5,346			$		9.95			$		5.39							1,598		$	10.54		$		5.83
	(1)              The exercise of SARs listed in this table resulted in the issuance of 99,851 shares of ICG’s Common Stock during the nine months ended September 30, 2013.
	There were 3,956,542 SARs and 4,338,250 SARs outstanding as of September 30, 2013 and December 31, 2012, respectively. The aggregate intrinsic value of the SARs outstanding as of September 30, 2013 and December 31, 2012 were $25.2 million and $16.0 million, respectively.
	Stock Options
	The fair value of each stock option is estimated on the grant date using the Black-Scholes option-pricing model. Stock options generally vest ratably over four years: 25% vest on the first anniversary of the grant date, and the remaining 75% vest ratably each month over the subsequent 36 months.
	Activity with respect to stock options during the three and six months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013																									2012
		Number								Weighted									Weighted							Number							Weighted				Weighted
		of Stock								Average									Average							of Stock							Average				Average
		Options								Base Price									Fair Value							Options							Base Price				Fair Value
	Exercised		—					$				—					$				—							26,342				$			7.08	$		5.07
	Expired		—					$				—					$				—							229				$			8.41	$		4.96
	Forfeited		—					$				—					$				—							—				$			—	$		—
		Nine Months Ended September 30,
		2013																									2012
		Number								Weighted									Weighted							Number							Weighted				Weighted
		of Stock								Average									Average							of Stock							Average				Average
		Options								Base Price									Fair Value							Options							Base Price				Fair Value
	Exercised		—					$				—					$				—							56,842				$			7.71	$		5.73
	Expired		—					$				—					$				—							8,229				$			10.62	$		8.16
	Forfeited		—					$				—					$				—							21				$			8.41	$		4.96
	There were 1,750 stock options outstanding as of both September 30, 2013 and December 31, 2012; the aggregate intrinsic value of the stock options outstanding as of both September 30, 2013 and December 31, 2012 was less than $0.1 million.
	SARs and Stock Options Fair Value Assumptions
	ICG estimates the grant date fair value of SARs and stock options using the Black-Scholes option-pricing model, which requires the input of highly subjective assumptions. Those assumptions include estimating the expected life of the award and estimating volatility of ICG’s stock price over the expected term. Expected volatility approximates the historical volatility of ICG’s Common Stock over the period commensurate with the expected term of the award. The expected term calculation is based on an average of the award vesting term and the life of the award. The risk-free interest rate is based on the U.S. Treasury yield in effect at the time of grant for an instrument with a maturity that is commensurate with the expected term of the award. Changes in the above assumptions, the estimated forfeitures and/or the requisite service period can materially affect the amount of equity-based compensation recognized on ICG’s Consolidated Statements of Operations.
	The following assumptions were used to determine the fair value of SARs granted to employees and a non-management director by ICG during the three- and nine-month periods ended September 30, 2013 and 2012:
		Three and Nine Months Ended September 30,
		2013					2012
	Expected volatility		—		%			56		%
Average expected life of SAR (in years)		—					6.25
Risk-free interest rate		—		%			0.92		%
Dividend yield		—		%			0		%
Restricted Stock
ICG periodically issues shares of restricted stock to its employees and non-management directors. Recipients of restricted stock do not pay cash consideration for the shares and have the right to vote all shares subject to the grant and receive all dividends with respect to the shares, whether or not the shares have vested. As of September 30, 2013, issued and unvested shares of restricted stock granted to ICG’s employees vest as follows: (1) 53,622 shares of restricted stock vest 25% each year over a four-year period, (2) 51,466 shares of restricted stock vest 12.5% on the nine-month anniversary of the grant date, and the remaining 87.5% every six months subsequent to the first vesting date and (3) 130,440 shares of restricted stock vest upon the achievement of certain performance goals, as discussed below. Additionally, as of September 30, 2013, 962,500 shares of restricted stock granted to ICG’s Chief Executive Officer and ICG’s President vest according to specified service periods, performance goals and market conditions, as discussed below.
During the nine months ended September 30, 2013, in lieu of their right to receive 50% of their respective target bonus amounts under the ICG 2013 Performance Plan (the “Performance Plan”) in cash, senior ICG employees, including each of ICG’s executive officers, were issued a total of 130,440 shares of restricted stock (the “Performance Shares”) (determined based on the value of 50% of their respective individual target bonuses under the Performance Plan and the closing price of ICG’s common stock of $13.09 per share on March 1, 2013, the date of the restricted stock grant). If and to the extent that an individual’s achievement percentage under the Performance Plan (1) is greater than or equal to 50%, all of that employee’s Performance Shares will vest or (2) is greater than 0% but less than 50%, a portion of that employee’s Performance Shares equal to two times the achievement percentage will vest. As of September 30, 2013, ICG expects all of those performance-based restricted stock awards to vest.
As of September 30, 2013, outstanding shares of restricted stock granted to ICG’s Chief Executive Officer and ICG’s President vest as follows: (1) 229,168 shares of restricted stock vest in equal installments each November and May through November 9, 2015, (2) 366,666 shares of restricted stock vest based on the achievement of stipulated performance goals related to ICG’s results on or before December 31, 2015, and (3) 366,666 shares of restricted stock vest based on stipulated market thresholds related to ICG’s Common Stock price through December 31, 2015. As of September 30, 2013, ICG does not believe that the stipulated performance goals related to the performance-based restricted stock awards would be probable of achievement in the event that the pending sale of Procurian to Accenture is consummated. Following the closing of the merger between Procurian and Accenture, ICG will determine whether the performance goals related to the performance-based restricted stock awards are improbable of achievement. If ICG determines that the performance-based restricted stock awards will not vest, ICG will reverse any previously-recorded equity compensation cost related to those awards.  During the three months ended September 30, 2013, ICG did not record any equity-based compensation related to those performance-based restricted stock awards, but did not reverse any previously recorded equity-based compensation. In the event of a change of control (as defined by the Plan) before December 31, 2015, all of the shares contingent upon the achievement of the financial and stock price metrics would automatically vest, and any unrecognized equity-based compensation expense associated with those awards would be immediately recognized. Additionally, in the event of a change of control during which ICG’s Chief Executive Officer and ICG’s President are terminated, any remaining service-based awards would automatically vest, and any unrecognized equity-based compensation expense associated with those awards would be immediately recognized. The pending sale of Procurian does not constitute a change of control for purposes of vesting any such equity awards.
During the nine months ended September 30, 2013 and 2012, ICG granted 30,750 shares and 18,750 shares, respectively, of restricted stock under ICG’s Amended and Restated Non-Management Director Compensation Plan (the “Director Plan”), which are included in the table below. See “Non-Management Director Equity-Based Compensation” in this Note 10 for additional details related to vesting.
Share activity with respect to restricted stock awards for the three and nine months ended September 30, 2013 and 2012 was as follows:
	Three Months Ended September 30,
	2013												2012
	Number of				Weighted							Number of					Weighted
	Shares				Average							Shares					Average
					Grant Date												Grant Date
					Fair Value												Fair Value
Granted		—			$		—							—			$		—
Vested		8,576			$		9.25							—			$		—
Forfeited		—			$		—							—			$		—
	Nine Months Ended September 30,
	2013												2012
	Number of				Weighted							Number of					Weighted
	Shares				Average							Shares					Average
					Grant Date												Grant Date
					Fair Value												Fair Value
Granted		168,190			$		13.06							116,973			$		9.11
Vested		146,480			$		10.69							68,711			$		10.19
Forfeited		10,395			$		10.58							375			$		12.15
There were 1,228,778 and 1,217,463 shares of restricted stock issued and unvested as of September 30, 2013 and December 31, 2012, respectively.
Non-Management Director Equity-Based Compensation
ICG periodically issues DSUs and/or shares of restricted stock to its non-management directors in accordance with the Director Plan. Each DSU represents a share of Common Stock into which that DSU will be converted upon the termination of the recipient’s service at ICG. DSUs issued annually under the Director Plan vest on the one-year anniversary of the grant date.
Each non-management director is also entitled to receive quarterly cash payments for his service on the Board of Directors and its committees, as applicable, under the Director Plan. Each director may elect to receive DSUs in lieu of all or a portion of those cash fees. Each participating director receives DSUs representing shares of ICG’s Common Stock with a fair market value equal to the relevant cash fees (with such fair market value determined by reference to the closing Common Stock price reported by NASDAQ on the date these cash fees otherwise would have been paid). DSUs received in lieu of cash fees are fully vested at the time they are granted and are settled in shares of ICG’s Common Stock upon the termination of the recipient’s service at ICG. The expense for those DSUs is recorded when the fees to which the DSUs relate are earned and is included in the line item “general and administrative” on ICG’s Consolidated Statements of Operations (but is not reflected in the summarized Equity-Based Compensation table above).
Share activity with respect to periodically-issued DSUs for the nine months ended September 30, 2013 and 2012 was as follows:
	Nine Months Ended September 30,
	2013												2012
	Number of				Grant Date							Number of					Grant Date
	DSUs				Fair Value							DSUs					Fair Value
Granted		29,250			$		13.09							41,250			$		8.40
Vested		41,250			$		8.40							52,500			$		13.32
There were 29,250 DSUs and 41,250 DSUs issued and unvested at September 30, 2013 and December 31, 2012, respectively. All 29,250 DSUs issued and unvested at September 30, 2013 are expected to vest during the three months ended March 31, 2014.
Activity related to grants of DSUs for service in lieu of cash for the three and nine months ended September 30 2013 and 2012 was as follows:
	Three Months Ended September 30,
	2013												2012
	Number of				Expense							Number of					Expense
	DSUs				Recognized							DSUs					Recognized
					(in thousands)												(in thousands)
Granted and vested		8,378			$		97							9,473			$		88
	Nine Months Ended September 30,
	2013												2012
	Number of				Expense							Number of					Expense
	DSUs				Recognized							DSUs					Recognized
					(in thousands)												(in thousands)
Granted and vested		23,750			$		288							24,724			$		264
Consolidated Core Businesses
All of ICG’s consolidated core businesses issue equity-based compensation awards to their employees. Those awards are most often in the form of stock options that vest over four years. The fair value of the stock option awards is estimated on the grant date using the Black-Scholes option pricing model. The majority of the stock options vest 25% on the first anniversary of the grant date, and the remaining 75% vest ratably each month over the subsequent 36 months. The remaining awards generally vest ratably over four years, with 25% vesting on each anniversary date over that term.

Other_Income_Loss

Other Income (Loss)	9 Months Ended
	Sep. 30, 2013
Other Income (Loss)	'
	11. Other Income (Loss)
	Other income (loss), net consists of the effect of transactions and other events relating to ICG’s ownership interests and its operations in general.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Gain on fair value of prior equity interest of CIML	$	—		$	26,563		$	—		$	26,563
	Realized gains on sales of marketable securities (Note 6)		—			106			23			1,552
	Gain on sale of GoIndustry (Note 6)		—			2,908			—			2,908
	Gains on sales/distributions of ownership interests		—			1,704			—			1,924
	Other		6			(55	)		(120	)		(94	)
			6			31,226			(97	)		32,853
	Total other income (loss) for consolidated core businesses		(74	)		(4	)		(81	)		(4	)
		$	(68	)	$	31,222		$	(178	)	$	32,849
	On July 11, 2012, ICG acquired additional equity interests in CIML and began to consolidate the financial position and results of CIML as of that date. In conjunction with the fair value determination of ICG’s previous equity interest in CIML, ICG recorded a gain of $26.6 million, representing the excess of ICG’s portion of the value of CIML over its carrying value from its previous equity interest as an equity method business at the date of consolidation. The primary valuation technique used to measure the acquisition date fair value of CIML immediately before the acquisition was the backsolve option-pricing method.
	During the three and nine months ended September 30, 2012, ICG recorded a gain of $1.7 million related to the receipt of 12,989 shares of ICE, based on the closing stock price of ICE common stock on the day it was released from escrow. That gain is included in the line item “Gains on sales/distributions of ownership interests” in the table above. See Note 6, “Equity and Cost Method Businesses” for details regarding the subsequent sale of the ICE common stock. During the nine months ended September 30, 2012, ICG recorded a gain of $0.2 million related to cash received from escrow in connection with the disposition of Metastorm Inc.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Taxes	'
	12. Income Taxes
	ICG Group, Inc., GovDelivery, InvestorForce (through January 29, 2013, the date of disposition), MSDSonline (beginning March 30, 2012, the date of acquisition) and Procurian file a consolidated federal income tax return. Bolt is not included in ICG’s consolidated federal income tax return. For the three and nine months ended September 30, 2013 and 2012, a tax provision was recognized for state and foreign income taxes; a full tax benefit for the loss from continuing operations was not recognized for federal income taxes because ICG maintains a valuation allowance on certain deferred tax assets that it believes, after evaluating all the positive and negative evidence, both historical and prospective, is more likely than not to not be realized. Following the pending sale of Procurian to Accenture, ICG expects to maintain a full valuation allowance against its net deferred tax assets.

Net_Income_Loss_per_Share

Net Income (Loss) per Share	9 Months Ended
	Sep. 30, 2013
Net Income (Loss) per Share	'
	13. Net Income (Loss) per Share
	The calculations of net income (loss) per share were:
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013					2012		2013			2012
		(in thousands, except per share data)
	Basic and Diluted:
	Income (loss) from continuing operations	$		(7,516		)	$	20,125	$	(26,809	)	$	2,205
	Income (loss) from discontinued operations			4,184				1,216		35,687			6,122
	Net income (loss) attributable to ICG Group, Inc.	$		(3,332		)	$	21,341	$	8,878		$	8,327
	Basic:
	Income (loss) from continuing operations per share	$		(0.21		)	$	0.57	$	(0.74	)	$	0.06
	Income (loss) from discontinued operations per share			0.12				0.03		0.98			0.17
	Net income (loss) attributable to ICG Group, Inc. per share	$		(0.09		)	$	0.60	$	0.24		$	0.23
	Diluted:
	Income (loss) from continuing operations per share	$		(0.21		)	$	0.56	$	(0.74	)	$	0.06
	Income (loss) from discontinued operations per share			0.12				0.03		0.98			0.17
	Net income (loss) attributable to ICG Group, Inc. per share	$		(0.09		)	$	0.59	$	0.24		$	0.23
	Shares used in computation of basic income (loss) per share			36,303				35,650		36,494			35,907
	SARs				—			511		—			425
	Stock options				—			52		—			55
	Restricted stock				—			39		—			25
	DSUs				—			21		—			23
	Shares used in the computation of diluted income (loss) per share				36,303			36,273		36,494			36,435
	The following potentially dilutive securities were not included in the computation of diluted net loss per share, as their effect would have been anti-dilutive:
		Units				Weighted Average
						Price per Share
	Three months ended September 30, 2013
	SARs		3,956,542			$	7.82
	Stock options		1,750			$	6.91
	Restricted stock (1)		1,228,778			$	—
	DSUs		29,250			$	—
	Nine months ended September 30, 2013
	SARs		3,956,542			$	7.82
	Stock options		1,750			$	6.91
	Restricted stock (1)		1,228,778			$	—
	DSUs		29,250			$	—
	Three months ended September 30, 2012
	SARs		797,475			$	10.59
	Stock options		—			$	—
	Restricted stock (1)		811,553			$	—
	DSUs		—			$	—
	Nine months ended September 30, 2012
	SARs		797,475			$	10.59
	Stock options		—			$	—
	Restricted stock (1)		811,553			$	—
	DSUs		—			$	—
	(1)              Anti-dilutive securities include contingently issuable shares unvested as of September 30, 2013 and 2012, the vesting of which is based on performance conditions and market conditions that have not yet been achieved. See Note 10, “Equity-Based Compensation.”

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Principles of Accounting for Ownership Interests	'
	Principles of Accounting for Ownership Interests
	The various interests that ICG acquires in its businesses are accounted for under one of three methods: the consolidation method, the equity method and the cost method. The applicable accounting method is generally determined based on ICG’s voting interest in a company.
Consolidation	'
	Consolidation. Businesses in which (1) ICG directly or indirectly owns more than 50% of the outstanding voting securities, and (2) other stockholders do not possess the right to affect significant management decisions are generally accounted for under the consolidation method of accounting. Participation of other stockholders in the net assets and in the earnings or losses of a consolidated subsidiary is reflected in the line items “Noncontrolling Interest” in ICG’s Consolidated Balance Sheets and “Net income attributable to the noncontrolling interest” in ICG’s Consolidated Statements of Operations. Noncontrolling interest adjusts ICG’s consolidated results of operations to reflect only ICG’s share of the earnings or losses of the consolidated subsidiary.
	Any changes in ICG’s ownership interest in a consolidated subsidiary, through additional equity issuances by the consolidated subsidiary or through ICG acquiring the shares from existing shareholders, in which ICG maintains control is recognized as an equity transaction, with appropriate adjustments to both ICG’s additional paid-in capital and the corresponding noncontrolling interests. The difference between the carrying amount of ICG’s ownership interest in the company and the underlying net book value of the company after the issuance of stock by the company is reflected as an equity transaction in ICG’s Consolidated Statements of Changes in Equity.
	An increase in ICG’s ownership interest in a business accounted for under the equity or cost method of accounting in which ICG obtains a controlling financial interest is accounted for as a step acquisition, with an allocation of the purchase price to the fair value of the net assets acquired. In addition, ICG remeasures its previously held ownership interest in a business that was previously not consolidated at the acquisition date fair value; any gain or loss resulting from this remeasurement is recognized in ICG’s Consolidated Statements of Operations at that time. ICG begins to include the financial position and operating results of the newly-consolidated subsidiary in its Consolidated Financial Statements from the date ICG obtains the controlling financial interest in that subsidiary. If control is lost, any retained interest is measured at fair value, and a gain or loss is recognized in ICG’s Consolidated Statements of Operations at that time. In addition, to the extent ICG maintains a smaller equity ownership, the accounting method used for that business is adjusted to the equity or cost method of accounting, as appropriate, for subsequent periods.
Equity Method	'
	Equity Method. Businesses that are not consolidated, but over which ICG exercises significant influence, are accounted for under the equity method of accounting and are referred to in the Notes to Consolidated Financial Statements as “equity method businesses.” The determination as to whether or not ICG exercises significant influence with respect to a company depends on an evaluation of several factors, including, among others, representation on the company’s board of directors and equity ownership level, which is generally between a 20% and a 50% interest in the voting securities of an equity method business, as well as voting rights associated with ICG’s holdings in common stock, preferred stock and other convertible instruments in that company. ICG’s share of the earnings and/or losses of the company, as well as any adjustments resulting from prior period finalizations of equity income/losses, are reflected in the line item “Equity loss” in ICG’s Consolidated Statements of Operations.
	An increase in ICG’s ownership interest in an equity method business over which ICG maintains significant influence is accounted for as a step acquisition, with an allocation of the excess purchase price to the fair value of the net assets acquired. A decrease in ICG’s ownership interest in an equity method business over which ICG maintains significant influence is accounted for as a dilution gain or loss in ICG’s Consolidated Statements of Operations and reflects the difference between ICG’s share of the underlying net assets of that company prior to the relevant change in ownership and ICG’s share of the underlying net assets of that company subsequent to the relevant change in ownership.
Cost Method	'
	Cost Method. Businesses not accounted for under either the consolidation method or equity method of accounting are accounted for under the cost method of accounting and are referred to in these Notes to Consolidated Financial Statements as “cost method businesses.” ICG’s share of the earnings and/or losses of cost method businesses is not included in ICG’s Consolidated Statement of Operations. However, impairment charges related to cost method businesses are recognized in ICG’s Consolidated Statements of Operations. If circumstances suggest that the value of a cost method business with respect to which an impairment charge has been made has subsequently recovered, that recovery is not recorded. The carrying values of ICG’s cost method businesses are reflected in the line item “Equity and cost method investments” in ICG’s Consolidated Balance Sheets.
	ICG initially records its carrying value in businesses accounted for under the cost method at cost, unless the equity securities of a cost method business have readily determinable fair values based on quoted market prices, in which case the interests are valued at fair value and are classified as marketable securities or some other classification in accordance with guidance for ownership interests in debt and equity securities.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates. Those estimates include evaluation of ICG’s convertible debt and equity holdings in businesses, holdings in marketable securities, asset impairment, revenue recognition, income taxes and commitments and contingencies. Those estimates and assumptions are based on management’s best judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, such as the current economic environment, that management believes to be reasonable under the circumstances. Management adjusts those estimates and assumptions when facts and circumstances dictate that it is necessary or appropriate to do so. It is reasonably possible that ICG’s accounting estimates with respect to the ultimate recoverability of ICG’s ownership interests in convertible debt and equity holdings, goodwill and the useful lives of intangible assets could change in the near term and that the effect of such changes on ICG’s consolidated financial statements could be material. Management believes the recorded amounts of goodwill, intangible assets, equity method businesses and cost method businesses were not impaired as of September 30, 2013.
Goodwill, Intangible assets, net, Equity Method Businesses and Cost Method Businesses	'
	Goodwill, Intangible assets, net, Equity Method Businesses and Cost Method Businesses
	ICG evaluates its carrying value in equity method businesses and cost method businesses continuously to determine whether an other-than-temporary decline in the fair value of any such business exists and should be recognized. In order to make that determination, ICG considers each such business’ achievement of its business plan objectives and milestones, the fair value of its ownership interest in each such business (which, in the case of any company listed on a public stock exchange, is the quoted stock price of the relevant ownership interest), the financial condition and prospects of each such business, and other relevant factors. The business plan objectives and milestones ICG considers include, among others, those related to financial performance, such as achievement of planned financial results or completion of capital raising activities, and those that are not primarily financial in nature, such as obtaining key business partnerships or the hiring of key employees. Impairment charges are determined by comparing ICG’s carrying value of a business with its estimated fair value. Fair value is determined by using a combination of estimating the cash flows related to the relevant asset, including estimated proceeds on disposition, and an analysis of market price multiples of companies engaged in lines of business similar to the company being evaluated. ICG concluded that the carrying value of its equity method businesses and cost method businesses was not impaired as of September 30, 2013 and December 31, 2012.
	ICG tests goodwill for impairment annually during the fourth quarter of each year, or more frequently as conditions warrant, and tests intangible assets for impairment when events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. ICG concluded that its goodwill and intangible assets were not impaired as of September 30, 2013 and December 31, 2012.
Revenue Recognition	'
	Revenue Recognition
	During the three and nine months ended September 30, 2013, ICG’s consolidated revenue was primarily attributable to Bolt, GovDelivery and MSDSonline. During the three and nine months ended September 30, 2012, ICG’s consolidated revenue was primarily attributable to GovDelivery and MSDSonline. MSDSonline was acquired on March 30, 2012; because the business’ results of operations for the two-day period from March 30, 2012 through March 31, 2012 were immaterial to ICG, revenue related to MSDSonline is included in ICG’s consolidated revenue beginning on April 1, 2012.
	Bolt generates revenue from (1) software licenses, (2) maintenance and support services, (3) professional service fees and (4) insurance commissions. Bolt’s software license revenue derives from licenses of its software products directly to end users and is recognized when persuasive evidence of an arrangement exists, delivery of the product has occurred, no significant obligations with regard to implementation remain, the fee is fixed or determinable and collectability is probable; Bolt’s software license revenue is recognized ratably over the applicable contract term. Bolt’s maintenance and customer support fees are recognized ratably over the life of maintenance and support contracts, which is typically one year. Bolt’s professional service fees revenue relates to professional services for software licenses that require significant customization, integration and installation; that revenue is recognized ratably over the applicable contract term. Finally, Bolt’s commissions on the premiums from sales of insurance policies are recognized when Bolt has sufficient information to determine the amount that is owed, it is probable that the economic benefits associated with the transaction will flow to Bolt, and the costs incurred, or to be incurred, with respect to the transaction can be accurately measured.
	GovDelivery revenue consists of (1) nonrefundable setup fees and (2) monthly maintenance and hosting fees. Those fees generally are deferred and recognized as the services are performed, which is typically over the service term. Costs related to performing setup services are expensed as incurred.
	MSDSonline derives revenue from three sources: (1) subscription fees, (2) professional services fees and (3) compliance solutions project fees. The vast majority of MSDSonline’s revenue is derived from subscription fees from customers accessing the business’ database and web-based tools; that revenue is recognized ratably over the applicable contract term, beginning on the contract implementation date. MSDSonline also generates (a) professional services fees from authoring and/or compiling its customers’ online libraries of material safety data sheet documents and indexing those documents for the customers’ use and (b) fees from training and compliance services projects; the revenue derived from those fees is recognized on a percentage of completion basis over the applicable project’s timeline.
Net Income (Loss) Per Share	'
	Net Income (Loss) Per Share
	Basic net income (loss) per share (EPS) is computed using the weighted average number of common shares outstanding during a given period. Diluted EPS includes shares, unless anti-dilutive, that would arise from the exercise of stock options and conversion of other convertible securities and is adjusted, if applicable, for the effect on net income (loss) of such transactions. See Note 13, “Net Income (Loss) per Share.”
Escrow Information	'
	Escrow Information
	When an interest in one of ICG’s businesses is sold, a portion of the sale consideration may be held in escrow primarily to satisfy purchase price adjustments and/or indemnity claims. ICG records gains on escrowed proceeds at the time ICG is entitled to receive such proceeds, the amount is fixed or determinable and realization is assured. As of September 30, 2013, the following amounts related to ICG’s potential proceeds from sales of former consolidated subsidiaries and equity method businesses remained in escrow to satisfy potential or ongoing indemnification claims: (1) $7.9 million of cash related to the sales of InvestorForce and Channel Intelligence, and (2) 11,650 shares of common stock for The Active Network, Inc. (NYSE: ACTV) (“Active”), valued at $0.2 million (based on the stock’s September 30, 2013 closing price) related to the sale of StarCite, Inc. (“StarCite”). Those outstanding escrows are scheduled to be released at various dates within the next two years, subject to pending and potential indemnity claims pursuant to the terms of the specific sales agreements.
Concentration of Customer Base and Credit Risk	'
	Concentration of Customer Base and Credit Risk
	For both the three and nine months ended September 30, 2013 and 2012, none of the customers of ICG’s businesses represented more than 10% of ICG’s consolidated revenue.
Commitments and Contingencies	'
	Commitments and Contingencies
	From time to time, ICG and its businesses are involved in various claims and legal actions arising in the ordinary course of business. ICG does not expect any liability with respect to any legal claims or actions that would materially affect its consolidated financial position or cash flows.
Reclassifications	'
	Reclassifications
	Certain amounts in the prior year financial statements have been reclassified to conform to the current-year presentation. The impact of the reclassifications made to prior year amounts is not material and did not affect net income (loss).
Discontinued Operations	'
	Discontinued Operations
	During the nine months ended September 30, 2013, InvestorForce and Channel Intelligence (a former subsidiary of CIML) were sold.  Additionally, on October 2, 2013, ICG executed a definitive merger agreement for the sale of Procurian to Accenture. Accordingly, ICG has recast all financial information within this Report to conform to the current period presentation and to present those three businesses as discontinued operations retrospectively for all periods presented.

Goodwill_and_Intangibles_Net_T

Goodwill and Intangibles, Net (Tables)	9 Months Ended
	Sep. 30, 2013
Summary of Activity Related to Goodwill	'
	The following table summarizes the activity related to ICG’s goodwill (in thousands):
		Gross Carrying				Accumulated			Net Carrying
		Amount				Impairment			Amount
						Losses
	Goodwill as of December 31, 2012	$		88,116		$	(304	)	$	87,812
	Estimated increase in goodwill due to preliminary allocation of acquisition price for subsidiary acquisition (Note 4)			1,177			—			1,177
	Goodwill as of September 30, 2013	$		89,293			(304	)	$	88,989
Summary of Intangible Assets from Continuing Operations	'
	The following table summarizes ICG’s intangible assets from continuing operations (in thousands):
					As of September 30, 2013
	Intangible Assets		Useful Life		Gross Carrying					Accumulated				Net Carrying
					Amount					Amortization				Amount
	Customer relationships		2-11 years		$	46,229			$		(7,992	)	$		38,237
	Trademarks/trade names		5-11 years			16,013					(1,965	)			14,048
	Technology		5-10 years			9,131					(1,744	)			7,387
	Non-compete agreements		2-3 years			3,666					(1,867	)			1,799
						75,039					(13,568	)			61,471
	Other intellectual property		Indefinite			400					—				400
					$	75,439			$		(13,568	)	$		61,871
					As of December 31, 2012
	Intangible Assets		Useful Life		Gross Carrying					Accumulated				Net Carrying
					Amount					Amortization				Amount
	Customer relationships		2-11 years		$	40,197			$		(4,961	)	$		35,236
	Trademarks/trade names		5-11 years			14,713					(866	)			13,847
	Technology		5-10 years			10,068					(588	)			9,480
	Non-compete agreements		2-3 years			3,666					(942	)			2,724
						68,644					(7,357	)			61,287
	Other intellectual property		Indefinite			400					—				400
					$	69,044			$		(7,357	)	$		61,687
Remaining Estimated Amortization Expense	'
	Remaining estimated amortization expense is as follows (in thousands):
	2013	$		2,329
	2014			9,290
	2015			8,317
	2016			7,867
	2017			7,549
	Thereafter			26,119
	Remaining amortization expense	$		61,471

Consolidated_Core_Businesses_T

Consolidated Core Businesses (Tables)	9 Months Ended
	Sep. 30, 2013
Allocation of Purchase Price for Acquisitions and Enterprise Value of Channel Intelligence	'
	The allocations of the purchase price related to the acquisition of MSDSonline and Superior Access and the allocation of the value upon consolidation of Bolt to identified intangible assets and tangible assets and liabilities are as follows (in thousands):
			MSDSonline			Bolt			Superior Access
	Net assets acquired:
	Goodwill	$	15,847		$	68,253		$	1,177
	Customer lists (5-11 year life)		20,440			6,800			5,200
	Trademarks, trade names and domain names (5-11 year life)		6,800			6,400			1,300
	Technology (5 year life)		1,900			4,300			1,300
	Non-compete agreements (3 year life)		3,580			—			—
	Other net assets (liabilities)		1,170			(5,150	)		23
			49,737			80,603			9,000
	Noncontrolling interest (1)		(1,355	)		(31,824	)		—
		$	48,382		$	48,779		$	9,000
	(1)              ICG estimated the fair value of the noncontrolling interest in Bolt and MSDSonline with consideration of discounts for lack of control and lack of marketability. See “Redeemable Noncontrolling Interest” in this Note 4 with respect to MSDSonline.
Reconciliation of Activity Related to Redeemable Noncontrolling Interest	'
	The following reconciles the activity related to the redeemable noncontrolling interest during the nine months ended September 30, 2013 and 2012 (in thousands):
	Balance at December 31, 2011	$	1,378
	Redeemable noncontrolling interest portion of subsidiary net (income)/loss		(132	)
	Accretion to estimated redemption value		345
	Acquisition of MSDSonline		1,309
	Impact of subsidiary equity transactions		6
	Balance at September 30, 2012	$	2,906
	Balance at December 31, 2012	$	3,383
	Redeemable noncontrolling interest portion of subsidiary net (income)/loss		(95	)
	Accretion to estimated redemption value		675
	Balance at September 30, 2013	$	3,963
Pro Forma Information	'
	The information in the following table represents revenue, net income (loss) attributable to ICG Group, Inc. and net income (loss) per diluted share attributable to ICG Group, Inc. for the relative periods, had ICG consolidated MSDSonline and Bolt (including Bolt’s acquisition of Superior Access) in each of those periods.
		Three Months Ended September 30,								Nine Months Ended September 30,
		2013			2012				2013			2012
		(in thousands, except per share data)
	Revenue	$	17.3		$	12.9			$		48.3	$	34.5
	Net income (loss) attributable to ICG Group, Inc.	$	(3.3	)	$	20.9			$		9.0	$	6.3
	Net income (loss) per diluted share attributable to ICG Group, Inc.	$	(0.09	)	$	0.57			$		0.25	$	0.17

Ownership_Interests_and_Cost_M

Ownership Interests and Cost Method Companies (Tables)	9 Months Ended
	Sep. 30, 2013
Summarized Financial Information Related to Companies Accounted for Under Equity Method of Accounting	'
	The following unaudited summarized financial information relates to ICG’s businesses accounted for under the equity method of accounting as of September 30, 2013 and December 31, 2012 and for the three- and nine-month periods ended September 30, 2013 and 2012. This aggregate information has been compiled from the financial statements of those businesses.
	Balance Sheets (Unaudited)
		September 30,			December 31,
		2013 (1)			2012 (2)
		(in thousands)
	Cash and cash equivalents	$	6,017		$	5,572
	Other current assets		12,121			11,268
	Non-current assets		13,193			13,218
	Total assets	$	31,331		$	30,058
	Current liabilities	$	23,327		$	21,115
	Non-current liabilities		6,525			1,397
	Long-term debt		10,194			12,670
	Stockholders’ deficit		(8,715	)		(5,124	)
	Total liabilities and stockholders’ deficit	$	31,331		$	30,058
	Total carrying value	$	14,390		$	13,333
	(1)              Includes (ICG voting ownership): Acquirgy (25%), CIML (38%), Freeborders (31%) and WhiteFence (36%).
	(2)              Includes (ICG voting ownership): Acquirgy (25%), Freeborders (31%) and WhiteFence (36%).
Results of Operations	'
	Results of Operations (Unaudited)
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013 (1)			2012 (2)			2013 (3)				2012 (2)
		(in thousands)
	Revenue	$	15,353		$	16,049		$		40,948		$	75,154
	Net income (loss)	$	(750	)	$	(2,993	)	$		(5,938	)	$	(15,554	)
	Equity income (loss) excluding impairments and amortization of intangible assets	$	(247	)	$	(1,325	)	$		(1,802	)	$	(6,272	)
	Amortization of intangible assets	$	(48	)		(283	)	$		(117	)		(875	)
	Total equity income (loss)	$	(295	)	$	(1,608	)	$		(1,919	)	$	(7,147	)
	(1)              Includes Acquirgy, CIML, Freeborders and WhiteFence.
	(2)              Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.
	(3)              Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.

Financial_Instruments_Tables

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Hierarchy of Financial Assets Measured at Fair Value on Recurring Basis	'
	The fair value hierarchy of ICG’s financial assets measured at fair value on a recurring basis was as follows (in thousands):
		Asset (liability) at		Valuation	Level 1			Level 2			Level 3
		September 30, 2013		Technique
				(Approach)
	Cash equivalents (money market accounts)	$	53,391	Market	$	53,391	$		—	$		—
		$	53,391		$	53,391	$		—	$		—
		Asset (liability) at		Valuation	Level 1			Level 2			Level 3
		December 31,  2012		Technique
				(Approach)
	Cash equivalents (money market accounts and commercial paper investments)	$	13,918	Market	$	13,918	$		—	$		—
		$	13,918		$	13,918	$		—	$		—
	The carrying value of certain of ICG’s other financial instruments, including accounts receivable and accounts payable approximates fair value due to the short-term nature of those instruments.  The fair value of ICG’s long-term debt is based on assumptions concerning the amount and timing of estimated future cash flows and assumed risk-adjusted discount rates.  See Note 8, “Debt” for further discussion.

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Long Term Debt Related to Consolidated Core Companies	'
	ICG’s long-term debt as of September 30, 2013 and December 31, 2012 consisted of the following:
		Interest Rates			September 30,		December 31,
					2013		2012
					(in thousands)
	Term loans and lines of credit	5.50-11.65	%		13,003			9,981
	Current maturities				(5,081	)		(336	)
	Long-term debt			$	7,922		$	9,645
Maturity of Long-Term Debt	'
	ICG’s long-term debt matures as follows:
	2013 (remainder of year)	$	1,165
	2014		4,213
	2015		4,695
	2016		2,373
	2017		557
		$	13,003

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Summary of Selected Information Related to Segments	'
	The following summarizes selected information related to the results of operations of ICG’s segments for the three and nine months ended September 30, 2013 and 2012, as well as the financial position of ICG’s segments as of September 30, 2013 and December 31, 2012. The amounts presented as “Dispositions” in the following table reflect (1) ICG’s share of the results of GoIndustry, which was sold on July 5, 2012, (2) InvestorForce, which was sold on January 29, 2013,  (3) Channel Intelligence, a former subisidiary of CIML, which was sold on February 20, 2013 and (4) Procurian, which entered into an agreement of merger on October 2, 2013. All significant intersegment activity has been eliminated. Assets reflected in each operating segment are owned by a company in that operating segment.
	Segment Information
	(in thousands)
		Core			Venture				Total				Dispositions				Corporate			Other (1)			Consolidated
									Segment														Results
	Three Months Ended September 30, 2013
	Revenue	$	16,071		$	—			$		16,071		$		—		$	—		$	—		$	16,071
	Net income (loss) attributable to ICG Group, Inc.	$	(3,953	)	$	(394	)		$		(4,347	)	$		4,474		$	(4,372	)	$	913		$	(3,332	)
	Three Months Ended September 30, 2012
	Revenue	$	7,384		$	614			$		7,998		$		—		$	—		$	—		$	7,998
	Net income (loss) attributable to ICG Group, Inc.	$	(4,592	)	$	(1,611	)		$		(6,203	)	$		1,399		$	(5,468	)	$	31,613		$	21,341
	Nine Months Ended September 30, 2013
	Revenue	$	41,092		$	429			$		41,521		$		—		$	—		$	—		$	41,521
	Net income (loss) attributable to ICG Group, Inc.	$	(14,114	)	$	(1,883	)		$		(15,997	)	$		33,991		$	(13,970	)	$	4,854		$	8,878
	Nine Months Ended September 30, 2012
	Revenue	$	16,995		$	614			$		17,609		$		—		$	—		$	—		$	17,609
	Net income (loss) attributable to ICG Group, Inc.	$	(13,286	)	$	(2,836	)		$		(16,122	)	$		6,479		$	(14,466	)	$	32,436		$	8,327
	(1)    The following table reflects the components in Other (in thousands):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013			2012				2013				2012
	Corporate other income (loss) (Note 11)	$	6		$	31,226			$		(97	)	$		32,853
	Noncontrolling interest (income) loss		907			387					4,951				(417	)
		$	913		$	31,613			$		4,854		$		32,436
		Core						Venture								Total					Dispositions						Corporate			Other			Consolidated
																Segment																	Results
	Assets as of:
	September 30, 2013	$	198,476			$				16,871				$			215,347			$		143,101				$		49,407	$		—	$		407,855
	December 31, 2012	$	185,160			$				17,822				$			202,982			$		229,605				$		14,472	$		—	$		447,059

EquityBased_Compensation_Table

Equity-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Additional Information Related to Equity-Based Compensation	'
	ICG issues the following types of equity-based compensation to its employees and non-employee directors: (1) stock appreciation rights (SARs), (2) stock options, (3) restricted stock and (4) deferred stock units (DSUs). The following table summarizes the equity-based compensation recognized in the respective periods; that equity-based compensation is included in operating expenses, primarily in the line item “General and administrative” on ICG’s Consolidated Statements of Operations.
	Equity-Based Compensation (in thousands, except weighted average years):
		Three Months Ended														Nine Months Ended											Unrecognized						Weighted Average
		September 30,														September 30,											Equity-Based						Years Remaining
																											Compensation						of Equity-Based
																											as of						Compensation as
		2013					2012							2013							2012						September 30, 2013						of September 30, 2013
	SARs	$		599			$		661					$				1,801			$	1,887			$				2,192					1.9
	Restricted Stock			1,020					737									3,446				2,134							6,794					2.3
	DSUs			96					87									282				332							160					0.4
	Equity-Based Compensation			1,715					1,485									5,529				4,353							9,146
	Equity-Based Compensation for Consolidated Core Businesses			165					136									510				323							1,698					2.8
	Equity-Based Compensation	$		1,880			$		1,621					$				6,039			$	4,676			$				10,844
Changes in Stock Appreciation Rights	'
	Activity with respect to SARs during the three and nine months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013																2012
		Number				Weighted					Weighted								Number				Weighted							Weighted
		of				Average					Average								of SARs				Average							Average
		SARs				Base Price					Fair Value												Base Price							Fair Value
	Granted		—			$		—			$		—							500				$	9.84						$	5.23
	Exercised (1)		220,874			$		7.59			$		4.55							16,000				$	8.41						$	4.96
	Forfeited		—			$		—			$		—							—				$	—						$	—
	(1)              The exercise of SARs listed in this table resulted in the issuance of 55,619 shares of ICG’s Common Stock during the three months ended September 30, 2013.
		Nine Months Ended September 30,
		2013																	2012
		Number				Weighted					Weighted							Number				Weighted			Weighted
		of				Average					Average							of SARs				Average			Average
		SARs				Base Price					Fair Value											Base Price			Fair Value
	Granted		—			$		—			$		—							260,125		$	9.23		$		4.89
	Exercised (1)		376,362			$		12.43			$		7.46							16,000		$	8.41		$		4.96
	Forfeited		5,346			$		9.95			$		5.39							1,598		$	10.54		$		5.83
	(1)              The exercise of SARs listed in this table resulted in the issuance of 99,851 shares of ICG’s Common Stock during the nine months ended September 30, 2013.
Changes in Stock Options	'
	Activity with respect to stock options during the three and six months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013																									2012
		Number								Weighted									Weighted							Number							Weighted				Weighted
		of Stock								Average									Average							of Stock							Average				Average
		Options								Base Price									Fair Value							Options							Base Price				Fair Value
	Exercised		—					$				—					$				—							26,342				$			7.08	$		5.07
	Expired		—					$				—					$				—							229				$			8.41	$		4.96
	Forfeited		—					$				—					$				—							—				$			—	$		—
		Nine Months Ended September 30,
		2013																									2012
		Number								Weighted									Weighted							Number							Weighted				Weighted
		of Stock								Average									Average							of Stock							Average				Average
		Options								Base Price									Fair Value							Options							Base Price				Fair Value
	Exercised		—					$				—					$				—							56,842				$			7.71	$		5.73
	Expired		—					$				—					$				—							8,229				$			10.62	$		8.16
	Forfeited		—					$				—					$				—							21				$			8.41	$		4.96
Assumptions Used to Determine Fair Value of Stock Appreciation Rights Granted to Employees	'
	The following assumptions were used to determine the fair value of SARs granted to employees and a non-management director by ICG during the three- and nine-month periods ended September 30, 2013 and 2012:
		Three and Nine Months Ended September 30,
		2013					2012
	Expected volatility		—		%			56		%
	Average expected life of SAR (in years)		—					6.25
	Risk-free interest rate		—		%			0.92		%
	Dividend yield		—		%			0		%
Changes in Restricted Stock	'
	Share activity with respect to restricted stock awards for the three and nine months ended September 30, 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013												2012
		Number of				Weighted							Number of					Weighted
		Shares				Average							Shares					Average
						Grant Date												Grant Date
						Fair Value												Fair Value
	Granted		—			$		—							—			$		—
	Vested		8,576			$		9.25							—			$		—
	Forfeited		—			$		—							—			$		—
		Nine Months Ended September 30,
		2013												2012
		Number of				Weighted							Number of					Weighted
		Shares				Average							Shares					Average
						Grant Date												Grant Date
						Fair Value												Fair Value
	Granted		168,190			$		13.06							116,973			$		9.11
	Vested		146,480			$		10.69							68,711			$		10.19
	Forfeited		10,395			$		10.58							375			$		12.15
Summary of Share Activity with Respect to Deferred Stock Units	'
	Share activity with respect to periodically-issued DSUs for the nine months ended September 30, 2013 and 2012 was as follows:
		Nine Months Ended September 30,
		2013												2012
		Number of				Grant Date							Number of					Grant Date
		DSUs				Fair Value							DSUs					Fair Value
	Granted		29,250			$		13.09							41,250			$		8.40
	Vested		41,250			$		8.40							52,500			$		13.32
Changes in Deferred Stock Units Related to Quarterly Grants	'
	Activity related to grants of DSUs for service in lieu of cash for the three and nine months ended September 30 2013 and 2012 was as follows:
		Three Months Ended September 30,
		2013												2012
		Number of				Expense							Number of					Expense
		DSUs				Recognized							DSUs					Recognized
						(in thousands)												(in thousands)
	Granted and vested		8,378			$		97							9,473			$		88
		Nine Months Ended September 30,
		2013												2012
		Number of				Expense							Number of					Expense
		DSUs				Recognized							DSUs					Recognized
						(in thousands)												(in thousands)
	Granted and vested		23,750			$		288							24,724			$		264

Other_Income_Loss_Tables

Other Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2013
Other Income (Loss), Net	'
	Other income (loss), net consists of the effect of transactions and other events relating to ICG’s ownership interests and its operations in general.
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Gain on fair value of prior equity interest of CIML	$	—		$	26,563		$	—		$	26,563
	Realized gains on sales of marketable securities (Note 6)		—			106			23			1,552
	Gain on sale of GoIndustry (Note 6)		—			2,908			—			2,908
	Gains on sales/distributions of ownership interests		—			1,704			—			1,924
	Other		6			(55	)		(120	)		(94	)
			6			31,226			(97	)		32,853
	Total other income (loss) for consolidated core businesses		(74	)		(4	)		(81	)		(4	)
		$	(68	)	$	31,222		$	(178	)	$	32,849

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Calculations of Net Income (Loss) Per Share	'
	The calculations of net income (loss) per share were:
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013					2012		2013			2012
		(in thousands, except per share data)
	Basic and Diluted:
	Income (loss) from continuing operations	$		(7,516		)	$	20,125	$	(26,809	)	$	2,205
	Income (loss) from discontinued operations			4,184				1,216		35,687			6,122
	Net income (loss) attributable to ICG Group, Inc.	$		(3,332		)	$	21,341	$	8,878		$	8,327
	Basic:
	Income (loss) from continuing operations per share	$		(0.21		)	$	0.57	$	(0.74	)	$	0.06
	Income (loss) from discontinued operations per share			0.12				0.03		0.98			0.17
	Net income (loss) attributable to ICG Group, Inc. per share	$		(0.09		)	$	0.60	$	0.24		$	0.23
	Diluted:
	Income (loss) from continuing operations per share	$		(0.21		)	$	0.56	$	(0.74	)	$	0.06
	Income (loss) from discontinued operations per share			0.12				0.03		0.98			0.17
	Net income (loss) attributable to ICG Group, Inc. per share	$		(0.09		)	$	0.59	$	0.24		$	0.23
	Shares used in computation of basic income (loss) per share			36,303				35,650		36,494			35,907
	SARs				—			511		—			425
	Stock options				—			52		—			55
	Restricted stock				—			39		—			25
	DSUs				—			21		—			23
	Shares used in the computation of diluted income (loss) per share				36,303			36,273		36,494			36,435
Potentially Dilutive Securities Not Included in Computation of Diluted Net Loss Per Share	'
	The following potentially dilutive securities were not included in the computation of diluted net loss per share, as their effect would have been anti-dilutive:
		Units				Weighted Average
						Price per Share
	Three months ended September 30, 2013
	SARs		3,956,542			$	7.82
	Stock options		1,750			$	6.91
	Restricted stock (1)		1,228,778			$	—
	DSUs		29,250			$	—
	Nine months ended September 30, 2013
	SARs		3,956,542			$	7.82
	Stock options		1,750			$	6.91
	Restricted stock (1)		1,228,778			$	—
	DSUs		29,250			$	—
	Three months ended September 30, 2012
	SARs		797,475			$	10.59
	Stock options		—			$	—
	Restricted stock (1)		811,553			$	—
	DSUs		—			$	—
	Nine months ended September 30, 2012
	SARs		797,475			$	10.59
	Stock options		—			$	—
	Restricted stock (1)		811,553			$	—
	DSUs		—			$	—
	(1)              Anti-dilutive securities include contingently issuable shares unvested as of September 30, 2013 and 2012, the vesting of which is based on performance conditions and market conditions that have not yet been achieved. See Note 10, “Equity-Based Compensation.”

The_Company_Additional_Informa

The Company - Additional Information (Detail)	Sep. 30, 2013	Sep. 30, 2013	Dec. 27, 2012	Jul. 11, 2012	Feb. 20, 2013	Sep. 30, 2013	Mar. 30, 2012
	Minimum	Maximum	Bolt	Channel Intelligence	Channel Intelligence	Msdsonline One	Msdsonline One
				Minimum	Maximum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]	'	'	'	'	'	'	'
Percentage of ownership	'	'	53.00%	'	'	'	'
Equity method investment, ownership percentage	20.00%	50.00%	'	52.00%	38.00%	'	'
Percentage of business acquisition	'	'	'	'	'	'	96.00%
Business acquisition date	'	'	'	'	'	30-Mar-12	'

Significant_Accounting_Policie2

Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended	9 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
			Bolt	Msdsonline One	Minimum	Maximum	Channel Intelligence	Zurich	Zurich
								Consolidated Revenue	Consolidated Revenue
Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'	'	'
Percentage of direct or indirect voting interest owned	'More than 50%	'	'	'	'	'	'	'	'
Equity method investment, ownership percentage	'	'	'	'	20.00%	50.00%	'	'	'
Period of operation available for MSDSonline	'	'Two days	'	'	'	'	'	'	'
Maintenance and customer support fees, contract life	'	'	'1 year	'	'	'	'	'	'
Number of sources of revenues	'	'	'	3	'	'	'	'	'
Expiry period of contingent gains associated with outstanding escrows	'2 years	'	'	'	'	'	'	'	'
Value of shares of common stock remaining in escrow	'	'	'	'	'	$0.20	'	'	'
Number of shares of common stock remaining in escrow	11,650	'	'	'	'	'	'	'	'
Proceeds from escrow releases	'	'	'	'	'	'	$7.90	'	'
Percentage of consolidated revenue	'	'	'	'	'	'	'	10.00%	10.00%

Summary_of_Intangible_Assets_f

Summary of Intangible Assets from Continuing Operations (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Indefinite-lived intangible asset useful life	'Indefinite	'Indefinite
Gross Carrying Amount	$75,039	$68,644
Intangible assets gross excluding goodwill	75,439	69,044
Accumulated Amortization	-13,568	-7,357
Finite intangible assets, Net Carrying Amount	61,471	61,287
Intangible assets, net	61,871	61,687
Other Intellectual Property	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Indefinite intangible assets, Net Carrying Amount	400	400
Customer Relationships	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Gross Carrying Amount	46,229	40,197
Accumulated Amortization	-7,992	-4,961
Finite intangible assets, Net Carrying Amount	38,237	35,236
Trademarks/trade names	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Gross Carrying Amount	16,013	14,713
Accumulated Amortization	-1,965	-866
Finite intangible assets, Net Carrying Amount	14,048	13,847
Technology	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'	'10 years
Gross Carrying Amount	9,131	10,068
Accumulated Amortization	-1,744	-588
Finite intangible assets, Net Carrying Amount	7,387	9,480
Non-compete Agreements	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Gross Carrying Amount	3,666	3,666
Accumulated Amortization	-1,867	-942
Finite intangible assets, Net Carrying Amount	$1,799	$2,724
Minimum | Customer Relationships	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'2 years	'2 years
Minimum | Trademarks/trade names	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'5 years
Minimum | Technology	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'5 years
Minimum | Non-compete Agreements	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'2 years	'2 years
Maximum | Customer Relationships	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'11 years
Maximum | Trademarks/trade names	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'11 years
Maximum | Technology	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'10 years	'10 years
Maximum | Non-compete Agreements	'	'
Intangible Assets Net Excluding Goodwill [Line Items]	'	'
Finite intangible assets, useful life	'3 years	'3 years

Remaining_Estimated_Amortizati

Remaining Estimated Amortization Expense (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill And Intangible Assets [Line Items]	'	'
2013	$2,329	'
2014	9,290	'
2015	8,317	'
2016	7,867	'
2017	7,549	'
Thereafter	26,119	'
Remaining amortization expense	$61,471	$61,287

Goodwill_and_Intangibles_net_A

Goodwill and Intangibles, net - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]	'	'	'	'	'
Goodwill increased (decreased) amount	'	'	'	'	$20,000,000
Acquisition of Superior Access, estimated goodwill	1,200,000	'	1,200,000	'	'
Amortization of intangible assets	2,176,000	1,511,000	6,211,000	3,318,000	'
Subsidiaries	'	'	'	'	'
Goodwill And Intangible Assets [Line Items]	'	'	'	'	'
Amortization of intangible assets	2,200,000	1,500,000	6,200,000	3,300,000	'
Bolt	'	'	'	'	'
Goodwill And Intangible Assets [Line Items]	'	'	'	'	'
Goodwill increased (decreased) amount	'	'	'	'	10,200,000
Amortization of intangible assets	600,000	'	1,700,000	'	'
Decrease in intangible assets	'	'	10,900,000	'	'
ICG	'	'	'	'	'
Goodwill And Intangible Assets [Line Items]	'	'	'	'	'
Goodwill increased (decreased) amount	-800,000	'	'	'	10,200,000
Additiona paid in capital increase (decrease) amount	-800,000	'	'	'	'
Decrease in intangible assets	'	'	23,000,000	'	'
Procurian	'	'	'	'	'
Goodwill And Intangible Assets [Line Items]	'	'	'	'	'
Goodwill increased (decreased) amount	'	'	'	'	-30,200,000
Decrease in intangible assets	'	'	$12,100,000	'	'

Summary_of_Activity_Related_to

Summary of Activity Related to Goodwill (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Goodwill And Intangible Assets [Line Items]	'
Goodwill, Gross Carrying Amount Beginning Balance	$88,116
Increase in goodwill, Gross Carrying Amount	1,177
Goodwill, Gross Carrying Amount Ending Balance	89,293
Goodwill, Accumulated Impairment Losses Beginning Balance	-304
Goodwill accumulated impairment losses adjustment	'
Goodwill, Accumulated Impairment Losses Ending Balance	-304
Goodwill, Net Carrying Amount Beginning Balance	87,812
Increase in goodwill, Net Carrying Amount	1,177
Goodwill, Net Carrying Amount Ending Balance	$88,989

Allocation_of_Purchase_Price_f

Allocation of Purchase Price for Acquisitions and Enterprise Value of Channel Intelligence (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Technology	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'	'10 years
Technology | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'5 years
Technology | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'10 years	'10 years
Non-compete Agreements | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'2 years	'2 years
Non-compete Agreements | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'3 years	'3 years
Msdsonline One | Customer Lists | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Msdsonline One | Customer Lists | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Msdsonline One | Technology	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Msdsonline One | Trademarks, trade names and domain names | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Msdsonline One | Trademarks, trade names and domain names | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Msdsonline One | Non-compete Agreements	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'3 years	'
Bolt | Customer Lists | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Bolt | Customer Lists | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Bolt | Technology	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Bolt | Trademarks, trade names and domain names | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Bolt | Trademarks, trade names and domain names | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Bolt | Non-compete Agreements	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'3 years	'
Superior Access | Customer Lists | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Superior Access | Customer Lists | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Superior Access | Technology	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Superior Access | Trademarks, trade names and domain names | Minimum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'5 years	'
Superior Access | Trademarks, trade names and domain names | Maximum	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'11 years	'
Superior Access | Non-compete Agreements	'	'
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]	'	'
Finite intangible assets, useful life	'3 years	'

Reconciliation_of_Activity_Rel

Reconciliation of Activity Related to Redeemable Noncontrolling Interest (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Reconciliation activity related to the redeemable non controlling interest	'	'
Beginning Balance	$3,383	'
Impact of subsidiary equity transactions	2,793	32,382
Ending Balance	3,963	'
Redeemable Noncontrolling Interest	'	'
Reconciliation activity related to the redeemable non controlling interest	'	'
Beginning Balance	3,383	1,378
Redeemable noncontrolling interest portion of subsidiary net (income)/loss	-95	-132
Accretion to estimated redemption value	675	345
Acquisition of MSDSonline	'	1,309
Impact of subsidiary equity transactions	'	6
Ending Balance	$3,963	$2,906

Consolidated_Core_Businesses_A

Consolidated Core Businesses - Additional Information (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2013	Mar. 30, 2012	Dec. 27, 2012	Aug. 09, 2013	Dec. 27, 2012	Dec. 27, 2012
In Millions, unless otherwise specified	Minimum	Maximum	Msdsonline One	Bolt	Bolt	Bolt	Bolt
						Minimum	Maximum
Subsidiary Or Equity Method Investee [Line Items]	'	'	'	'	'	'	'
Percentage of business acquisition	'	'	96.00%	'	'	'	'
Additional equity ownership acquired	'	'	'	$13.20	'	'	'
Equity method investment, ownership percentage	20.00%	50.00%	'	'	'	38.00%	53.00%
Cash paid for acquisition	'	'	'	'	$9	'	'

Pro_Forma_Information_Detail

Pro Forma Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]	'	'	'	'
Revenue	$17,300	$12,900	$48,300	$34,500
Net income (loss) attributable to ICG Group, Inc.	($3,300)	$20,900	$9,000	$6,300
Net income (loss) per diluted share attributable to ICG Group, Inc.	($0.09)	$0.57	$0.25	$0.17

Allocation_of_Purchase_Price_f1

Allocation of Purchase Price for Acquisitions and Enterprise Value of Channel Intelligence (Detail) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Net assets acquired:	'		'
Goodwill	$88,989		$87,812
Msdsonline One	'		'
Net assets acquired:	'		'
Goodwill	15,847		'
Customer lists (5-11 year life)	20,440		'
Trademarks, trade names and domain names (5-11 year life)	6,800		'
Technology (5 year life)	1,900		'
Non-compete agreements (3 year life)	3,580		'
Other net assets (liabilities)	1,170		'
Purchase price allocation assets acquired	49,737		'
Noncontrolling interest	-1,355	[1]	'
Purchase price allocation assets acquired liabilities net	48,382		'
Bolt	'		'
Net assets acquired:	'		'
Goodwill	68,253		'
Customer lists (5-11 year life)	6,800		'
Trademarks, trade names and domain names (5-11 year life)	6,400		'
Technology (5 year life)	4,300		'
Other net assets (liabilities)	-5,150		'
Purchase price allocation assets acquired	80,603		'
Noncontrolling interest	-31,824	[1]	'
Purchase price allocation assets acquired liabilities net	48,779		'
Superior Access	'		'
Net assets acquired:	'		'
Goodwill	1,177		'
Customer lists (5-11 year life)	5,200		'
Trademarks, trade names and domain names (5-11 year life)	1,300		'
Technology (5 year life)	1,300		'
Other net assets (liabilities)	23		'
Purchase price allocation assets acquired	9,000		'
Purchase price allocation assets acquired liabilities net	$9,000		'
[1]	ICG estimated the fair value of the noncontrolling interest in Bolt and MSDSonline with consideration of discounts for lack of control and lack of marketability. See “Redeemable Noncontrolling Interest” in this Note 4 with respect to MSDSonline.

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jan. 31, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Feb. 20, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Investorforce

Investorforce

Investorforce

Investorforce

Investorforce

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Channel Intelligence

Procurian

Procurian

Procurian

Procurian

Procurian

Procurian

Developed Technology

Licensing And Servicing Agreements

Trademarks, trade names and domain names

Customer Relationships

Subsidiary Or Equity Method Investee [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consideration from divestiture of business

'

'

'

'

$23,600,000

'

'

'

'

$125,000,000

'

'

'

'

'

'

'

'

'

'

'

'

$324,000,000

'

Consideration from sale of business in cash

'

'

'

'

20,800,000

'

'

'

'

60,500,000

'

'

'

'

'

'

'

'

'

'

375,000,000

'

'

'

Gain on sale of business

'

'

'

'

'

'

15,700,000

'

'

'

'

'

17,800,000

'

'

'

'

'

'

'

'

'

'

'

Revenue

'

'

'

'

'

2,100,000

800,000

6,300,000

'

'

3,100,000

5,100,000

'

'

'

'

'

'

33,900,000

37,500,000

103,400,000

105,400,000

'

'

Income (loss) from discontinued operations, including gain on sale, net of tax

4,474,000

1,595,000

33,991,000

7,411,000

'

300,000

400,000

1,100,000

'

'

2,100,000

1,700,000

'

'

'

'

'

'

1,700,000

2,200,000

4,100,000

7,000,000

'

'

Assets held for sale / assets of discontinued operations

'

'

'

'

'

'

'

'

3,400,000

'

'

'

'

7,100,000

'

'

'

'

71,100,000

'

71,100,000

'

'

72,800,000

Liabilities held for sale / liabilities of discontinued operations

'

'

'

'

'

'

'

'

3,900,000

'

'

'

'

6,500,000

'

'

'

'

22,100,000

'

22,100,000

'

'

30,600,000

Goodwill in discontinued operations

'

'

'

'

'

'

'

'

700,000

'

'

'

'

48,895,000

'

'

'

'

30,500,000

'

30,500,000

'

'

30,500,000

Discontinued operation, intangible amortization

'

'

'

'

'

'

'

'

'

'

'

700,000

'

'

'

'

'

'

'

'

'

'

'

'

Intangible assets

'

'

'

'

'

'

'

'

'

'

'

'

'

22,434,000

2,710,000

3,519,000

6,683,000

9,522,000

10,900,000

'

10,900,000

'

'

12,100,000

Proceeds from sales/distributions of ownership interests

'

'

73,469,000

20,525,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncurrent assets of discontinued operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,700,000

'

14,700,000

'

'

19,500,000

Noncurrent liabilities of discontinued operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

16,700,000

'

16,700,000

'

'

22,900,000

Deferred tax assets in discontinued operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$15,900,000

'

$15,900,000

'

'

$12,200,000

Summarized_Financial_Informati

Summarized Financial Information Related to Companies Accounted for Under Equity Method of Accounting (Detail) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Equity Method Investments [Line Items]	'		'
Cash and cash equivalents and Other current assets	$12,121	[1]	$11,268	[2]
Non-current assets	13,193	[1]	13,218	[2]
Total assets	31,331	[1]	30,058	[2]
Current liabilities	23,327	[1]	21,115	[2]
Non-current liabilities and Long-term debt	6,525	[1]	1,397	[2]
Stockholders’ deficit	-8,715	[1]	-5,124	[2]
Total liabilities and stockholders’ deficit	31,331	[1]	30,058	[2]
Total carrying value	14,390	[1]	13,333	[2]
Cash and Cash Equivalents	'		'
Schedule Of Equity Method Investments [Line Items]	'		'
Cash and cash equivalents and Other current assets	6,017	[1]	5,572	[2]
Long-term Debt	'		'
Schedule Of Equity Method Investments [Line Items]	'		'
Non-current liabilities and Long-term debt	$10,194	[1]	$12,670	[2]
[1]	Includes (ICG voting ownership): Acquirgy (25%), CIML (38%), Freeborders (31%) and WhiteFence (36%).
[2]	Includes (ICG voting ownership): Acquirgy (25%), Freeborders (31%) and WhiteFence (36%).

Summarized_Financial_Informati1

Summarized Financial Information Related to Companies Accounted for Under Equity Method of Accounting (Parenthetical) (Detail)	Sep. 30, 2013	Dec. 31, 2012
Acquirgy	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Equity method investment, ownership percentage	25.00%	25.00%
Channel Intelligence	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Equity method investment, ownership percentage	38.00%	'
Freeborders	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Equity method investment, ownership percentage	31.00%	31.00%
WhiteFence	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Equity method investment, ownership percentage	36.00%	36.00%

Results_of_Operations_Detail

Results of Operations (Detail) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Schedule Of Equity Method Investments [Line Items]	'		'		'		'
Revenue	$15,353	[1]	$16,049	[2]	$40,948	[3]	$75,154	[2]
Net income (loss)	-750	[1]	-2,993	[2]	-5,938	[3]	-15,554	[2]
Equity income (loss) excluding impairments and amortization of intangible assets	-247	[1]	-1,325	[2]	-1,802	[3]	-6,272	[2]
Amortization of intangible assets	-48	[1]	-283	[2]	-117	[3]	-875	[2]
Total equity income (loss)	($295)	[1]	($1,608)	[2]	($1,919)	[3]	($7,147)	[2]
[1]	Includes Acquirgy, CIML, Freeborders and WhiteFence.
[2]	Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.
[3]	Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.

Ownership_Interests_and_Cost_M1

Ownership Interests and Cost Method Companies - Additional Information (Detail) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2011

Marketable securities

Prepaid Expenses and Other Current Assets

Active

Active

Intercontinental Exchange

Intercontinental Exchange

Intercontinental Exchange

Anthem

Go Industry

Go Industry

Bolt

Bolt

Schedule Of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net asset of equity method

$16,500,000

'

$16,500,000

'

$15,300,000

'

'

'

'

'

'

'

'

'

'

'

'

Net asset allocated of equity method goodwill

14,300,000

'

14,300,000

'

12,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Allocated of equity method intangible

2,200,000

'

2,200,000

'

3,300,000

'

'

'

'

'

'

'

'

'

'

'

'

Amortized period

'

'

'5 years

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of intangible assets

-48,000

[1]

-283,000

[2]

-117,000

[3]

-875,000

[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquired preferred stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,000,000

'

Equity method investment, ownership percentage

'

'

'

'

'

'

'

'

'

'

'

'

9.00%

'

'

38.00%

26.00%

Fair value of active common stock remaining

'

'

'

'

700,000

300,000

400,000

'

'

'

'

'

'

'

'

'

'

Sale of common stock, shares

'

'

'

'

'

'

'

150,233

447,057

'

'

'

'

'

'

'

'

Common stock price per share

'

'

'

'

'

'

'

$5.10

$16.88

'

'

'

'

'

'

'

'

Proceeds from sales of marketable securities

'

'

760,000

7,632,000

'

'

'

800,000

7,500,000

'

1.8

'

'

'

'

'

'

Gain on sale of securities

'

'

'

'

'

'

'

100,000

1,400,000

'

100,000

'

'

'

'

'

'

Number of Shares Distributed has Escrowed Proceeds Related to the Disposition of a Former Company

'

12,989

'

12,989

'

'

'

'

'

12,989

'

12,989

'

'

'

'

'

Gains on sales/distributions of ownership interests

'

1,700,000

'

1,700,000

'

'

'

'

'

1,700,000

'

1,700,000

'

'

'

'

'

Carrying value of holdings in cost method companies

15,700,000

'

15,700,000

'

13,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Sale proceeds

'

'

'

'

'

'

'

'

'

'

'

'

'

2,900,000

2,900,000

'

'

Carrying value of transaction costs

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

Equity loss

'

'

'

'

'

'

'

'

'

'

'

'

'

($200,000)

($700,000)

'

'

[1]

Includes Acquirgy, CIML, Freeborders and WhiteFence.

[2]

Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.

[3]

Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.

Fair_Value_Hierarchy_of_Financ

Fair Value Hierarchy of Financial Assets Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Cash equivalents (money market accounts)	53,391	13,918
Fair Value Assets And Liabilities Measured On Recurring Basis Net, Total	53,391	13,918
Cash Equivalents	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Valuation Technique (Approach)	'Market	'Market
Fair Value, Inputs, Level 1	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Cash equivalents (money market accounts)	53,391	13,918
Fair Value Assets And Liabilities Measured On Recurring Basis Net, Total	53,391	13,918

Long_Term_Debt_Related_to_Cons

Long Term Debt Related to Consolidated Core Companies (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
In Thousands, unless otherwise specified			Term Loans and Lines of Credit
Debt Instrument [Line Items]	'	'	'
Interest Rates, Maximum	'	'	11.65%
Interest Rates, Minimum	'	'	5.50%
Long term debt including current maturities	$13,003	$9,981	'
Current maturities	-5,081	-336	'
Long-term debt	$7,922	$9,645	'

Maturity_of_LongTerm_Debt_Deta

Maturity of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Long Term Debt Maturities Repayments Of Principal [Line Items]	'
2013 (remainder of year)	$1,165
2014	4,213
2015	4,695
2016	2,373
2017	557
Long-term debt, Total	$13,003

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Oct. 22, 2012

Sep. 30, 2013

Oct. 22, 2012

Sep. 30, 2013

Sep. 30, 2013

Aug. 09, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Nov. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Nov. 30, 2012

Horizon

Horizon

Horizon

Horizon

Horizon

Horizon

Neurone

Neurone

Neurone

Venture Bank

Venture Bank

Venture Bank

Venture Bank

Venture Bank

Venture Bank

Venture Bank

Revolving Credit Facility

Revolving Credit Facility

Term Loan Credit Facility

Term Loan Credit Facility

Term Loan Credit Facility

Term Loan Credit Facility

Minimum

Revolving Credit Facility

Revolving Credit Facility

Term Loan Credit Facility

Term Loan Credit Facility

Term Loan Credit Facility

Line Of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit

'

'

'

$5

'

$5

'

'

$0.50

'

'

'

$2

'

'

$2.50

Fair value of line of credit

9.5

9.8

'

'

'

'

0.5

'

'

'

'

'

'

'

'

'

Loan interest rate

11.65%

'

'

'

'

'

8.00%

'

'

'

'

'

'

'

'

'

Loans maturity date

1-May-16

'

'

'

'

'

9-Aug-14

'

'

30-Nov-17

'

'

'

'

'

'

Line of credit outstanding amount

'

'

5

'

5

'

'

0.5

'

'

'

0.8

'

2.3

2.5

'

Prime rate

'

'

'

'

'

'

'

'

'

'Prime rate plus 2.0%

'

'

'

'

'

'

Prime rate percentage

'

'

'

'

'

'

'

'

'

2.00%

5.50%

'

'

'

'

'

Debt instrument fair value

'

'

'

'

'

'

'

'

'

'

'

$0.80

'

$2.30

$2.40

'

Summary_of_Selected_Informatio

Summary of Selected Information Related to Segments (Detail) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	$16,071		$7,998		$41,521		$17,609		'
Net income (loss) attributable to ICG Group, Inc.	-3,332		21,341		8,878		8,327		'
Assets	407,855		'		407,855		'		447,059
Operating Segments	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	16,071		7,998		41,521		17,609		'
Net income (loss) attributable to ICG Group, Inc.	-4,347		-6,203		-15,997		-16,122		'
Assets	215,347		'		215,347		'		202,982
Operating Segments | Core	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	16,071		7,384		41,092		16,995		'
Net income (loss) attributable to ICG Group, Inc.	-3,953		-4,592		-14,114		-13,286		'
Assets	198,476		'		198,476		'		185,160
Operating Segments | Venture	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	'		614		429		614		'
Net income (loss) attributable to ICG Group, Inc.	-394		-1,611		-1,883		-2,836		'
Assets	16,871		'		16,871		'		17,822
Dispositions	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	'		'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	4,474		1,399		33,991		6,479		'
Assets	143,101		'		143,101		'		229,605
Corporate	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	'		'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	-4,372		-5,468		-13,970		-14,466		'
Assets	49,407		'		49,407		'		14,472
Other	'		'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'		'
Revenue	'	[1]	'	[1]	'	[1]	'	[1]	'
Net income (loss) attributable to ICG Group, Inc.	913	[1]	31,613	[1]	4,854	[1]	32,436	[1]	'
Assets	'		'		'		'		'
[1]	(1) The following table reflects the components in Other (in thousands):  Three Months Ended September 30,Nine Months Ended September 30,  2013   2012   2013   2012  Corporate other income (loss) (Note 11)$6   $31,226    $(97)   $32,853   Noncontrolling interest (income) loss 907     387    4,951    (417)   $913    $31,613    $4,854    $32,436   Â

Summary_of_Selected_Informatio1

Summary of Selected Information Related to Segments (Parenthetical) (Detail) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	($3,332)		$21,341		$8,878		$8,327
Corporate other income (loss) (Note 11)	'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	6		31,226		-97		32,853
Noncontrolling interest (income) loss	'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	907		387		4,951		-417
Other	'		'		'		'
Segment Reporting Revenue Reconciling Item [Line Items]	'		'		'		'
Net income (loss) attributable to ICG Group, Inc.	$913	[1]	$31,613	[1]	$4,854	[1]	$32,436	[1]
[1]	(1) The following table reflects the components in Other (in thousands):  Three Months Ended September 30,Nine Months Ended September 30,  2013   2012   2013   2012  Corporate other income (loss) (Note 11)$6   $31,226    $(97)   $32,853   Noncontrolling interest (income) loss 907     387    4,951    (417)   $913    $31,613    $4,854    $32,436   Â

Segment_Information_Additional

Segment Information - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
			Segment
Segment Reporting Information [Line Items]	'	'	'	'
Number of reporting segments	'	'	2	'
Revenue	$16,071	$7,998	$41,521	$17,609
Dispositions	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue	'	'	'	'
Outside United States	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue	$600	$200	$1,800	$700
Go Industry | Dispositions	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Segments disposal date	'	'	5-Jul-12	'
Investorforce | Dispositions	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Segments disposal date	'	'	29-Jan-13	'
Channel Intelligence | Dispositions	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Segments disposal date	'	'	20-Feb-13	'

Additional_Information_Related

Additional Information Related to Equity-Based Compensation (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	$1,880	$1,621	$6,039	$4,676
Unrecognized Equity-Based Compensation	10,844	'	10,844	'
Weighted Average Years Remaining of Equity-Based Compensation	'	'	'	'
SARs	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	599	661	1,801	1,887
Unrecognized Equity-Based Compensation	2,192	'	2,192	'
Weighted Average Years Remaining of Equity-Based Compensation	'1 year 10 months 24 days	'	'1 year 10 months 24 days	'
Restricted Stock	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	1,020	737	3,446	2,134
Unrecognized Equity-Based Compensation	6,794	'	6,794	'
Weighted Average Years Remaining of Equity-Based Compensation	'2 years 3 months 18 days	'	'2 years 3 months 18 days	'
DSUs	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	96	87	282	332
Unrecognized Equity-Based Compensation	160	'	160	'
Weighted Average Years Remaining of Equity-Based Compensation	'4 months 24 days	'	'4 months 24 days	'
Equity-Based Compensation	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	1,715	1,485	5,529	4,353
Unrecognized Equity-Based Compensation	9,146	'	9,146	'
Weighted Average Years Remaining of Equity-Based Compensation	'	'	'	'
Non- Controlling Interest	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Equity-based compensation	165	136	510	323
Unrecognized Equity-Based Compensation	$1,698	'	$1,698	'
Weighted Average Years Remaining of Equity-Based Compensation	'2 years 9 months 18 days	'	'2 years 9 months 18 days	'

Changes_in_Stock_Appreciation_

Changes in Stock Appreciation Rights (Detail) (SARs, USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
SARs	'		'		'		'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'		'		'		'
SAR's Granted	'		500		'		260,125
SAR's Exercised	220,874	[1]	16,000	[1]	376,362	[2]	16,000	[2]
SAR's Forfeited	'		'		5,346		1,598
Weighted Average Base Price, Granted	'		$9.84		'		$9.23
Weighted Average Base Price, Exercised	$7.59	[1]	$8.41	[1]	$12.43	[2]	$8.41	[2]
Weighted Average Base Price, Forfeited	'		'		$9.95		$10.54
Weighted Average Grant Date Fair Value, Granted	'		$5.23		'		$4.89
Restricted stock awards, closing price	$4.55	[1]	$4.96	[1]	$7.46	[2]	$4.96	[2]
Weighted Average Grant Date Fair Value, Forfeited	'		'		$5.39		$5.83
[1]	The exercise of SARs listed in this table resulted in the issuance of 55,619 shares of ICG’s Common Stock during the three months ended September 30, 2013.
[2]	The exercise of SARs listed in this table resulted in the issuance of 99,851 shares of ICG’s Common Stock during the nine months ended September 30, 2013.

Changes_in_Stock_Appreciation_1

Changes in Stock Appreciation Rights (Parenthetical) (Detail) (SARs)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
SARs	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'
Common stock issued upon exercise of SARs	55,619	99,851

Changes_in_Stock_Options_Detai

Changes in Stock Options (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Exercise of SARs and stock options, net of surrenders, shares	'	26,342	56,842
Number of Stock Options, Cancelled	'	229	8,229
Number of Stock Options, Forfeited	'	'	21
Weighted Average Base Price, Exercised	'	$7.08	$7.71
Weighted Average Base Price, Cancelled	'	$8.41	$10.62
Weighted Average Base Price, Forfeited	'	'	$8.41
Weighted Average Fair Value, Exercised	'	$5.07	$5.73
Weighted Average Fair Value, Cancelled	'	$4.96	$8.16
Weighted Average Fair Value, Forfeited	'	'	$4.96

Assumptions_Used_to_Determine_

Assumptions Used to Determine Fair Value of Stock Appreciation Rights Granted to Employees (Detail) (SARs)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
SARs	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'	'	'
Expected volatility	'	56.00%	'	56.00%
Average expected life of SAR (in years)	'0 years	'6 years 3 months	'0 years	'6 years 3 months
Risk-free interest rate	'	0.92%	'	0.92%
Dividend yield	'	0.00%	'	0.00%

Changes_in_Restricted_Stock_De

Changes in Restricted Stock (Detail) (Restricted Stock, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restricted Stock	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Number of Shares, Granted	'	'	168,190	116,973
Number of Shares, Vested	8,576	'	146,480	68,711
Number of Shares, Forfeited	'	'	10,395	375
Weighted Average Grant Date Fair Value, Granted	'	'	$13.06	$9.11
Restricted stock awards, closing price	$9.25	'	$10.69	$10.19
Weighted Average Grant Date Fair Value, Forfeited	'	'	$10.58	$12.15

Summary_of_Share_Activity_with

Summary of Share Activity with Respect to Deferred Stock Units (Details) (Deferred Stock Units, USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Deferred Stock Units	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'
Number of Shares, Granted	29,250	41,250
Number of Shares, Vested	41,250	52,500
Weighted Average Grant Date Fair Value, Granted	$13.09	$8.40
Restricted stock awards, closing price	$8.40	$13.32

Changes_in_Deferred_Stock_Unit

Changes in Deferred Stock Units Related to Quarterly Grants (Detail) (Deferred Stock Units, USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Deferred Stock Units	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Number of DSUs, Granted and vested	8,378	9,473	23,750	24,724
Expense Recognized, Granted and vested	$97	$88	$288	$264

EquityBased_Compensation_Addit

Equity-Based Compensation - Additional Information. (Detail) (USD $)

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

SARs

SARs

SARs

SARs

Stock Options

Stock Options

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock

Restricted Stock Award

Restricted Stock Award

Minimum

Minimum

Maximum

Maximum

Consolidated Entities

ICG 2013 Performance Plan

Non-Management Directors (Director Plan)

Non-Management Directors (Director Plan)

ICG's Chief Executive Officer and ICG's President

First Vesting

First Vesting

Second Vesting

Second Vesting

Third Vesting

Third Vesting

Stock Options

Restricted Stock

Stock Options

Restricted Stock

Stock Options

ICG's Employees

ICG's Chief Executive Officer and ICG's President

ICG's Employees

ICG's Chief Executive Officer and ICG's President

ICG's Employees

ICG's Chief Executive Officer and ICG's President

Condition One

Condition Two

ICG 2013 Performance Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock awards vesting period

'

'

'

'

'4 years

'

'4 years

'

'

'

'

'

'

'

'

'

'4 years

'

'

'

'

'

'

'

'1 year

'

'4 years

'

'4 years

Expiry period of incentive or non-qualified stock options granted from date of grant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'8 years

'

'10 years

'

'

SARs vesting on the first anniversary

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining SARs vesting equally each month

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Subsequent vesting of remaining SARs, period

'36 months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

SARs outstanding

3,956,542

4,338,250

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic values of SARs outstanding

$25.20

$16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation awards vesting on the first anniversary

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

Remaining Equity-based compensation awards vesting equally each month

'

'

'

'

'

'

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75.00%

Remaining awards vesting period

'

'

'

'

'

'

'36 months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'36 months

Stock options, outstanding

'

'

'

'

'

'

1,750

1,750

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of the stock options, outstanding

'

'

'

'

'

'

$0.10

$0.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Awards Vesting Shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

53,622

229,168

51,466

366,666

130,440

366,666

'

'

'

'

'

'

'

Stock vesting description

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'53,622 shares of restricted stock vest 25% each year over a four-year period

'229,168 shares of restricted stock vest in equal installments each November and May through November 9, 2015

'51,466 shares of restricted stock vest 12.5% on the nine-month anniversary of the grant date, and the remaining 87.5% every six months subsequent to the first vesting date

'366,666 shares of restricted stock vest based on the achievement of stipulated performance goals related to ICG’s results on or before December 31, 2015

'130,440 shares of restricted stock vest upon the achievement of certain performance goals

'366,666 shares of restricted stock vest based on stipulated market thresholds related to ICG’s Common Stock price through December 31, 2015.

'

'

'

'

'

'

'

Stock awards vesting rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

Stock awards vesting on the Nine month anniversary

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12.50%

'

'

'

'

'

'

'

'

'

'

Remaining Restricted stock awards vesting equally each six months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

87.50%

'

'

'

'

'

'

'

'

'

'

Number of Shares, Granted

'

'

'

'

'

'

'

'

'

'

168,190

116,973

130,440

30,750

18,750

962,500

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of shares of restricted stock to vest upon achievement of performance condition

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock awards, closing price

'

'

$4.55

[1]

$4.96

[1]

$7.46

[2]

$4.96

[2]

'

'

$9.25

'

$10.69

$10.19

$13.09

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Performance shares vesting conditions

'

'

'

'

'

'

'

'

'

'

'

'

'(1) is greater than or equal to 50%, all of that employee’s Performance Shares will vest or (2) is greater than 0% but less than 50%, a portion of that employee’s Performance Shares equal to two times the achievement percentage will vest.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of financial targets to be achieved for participants to receive award

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

50.00%

'

Restricted stock awards vesting on anniversary

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock unvested

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,228,778

1,217,463

'

'

'

'

'

Deferred Stock Units unvested

29,250

41,250

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining awards vesting percentage on each anniversary

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

[1]

The exercise of SARs listed in this table resulted in the issuance of 55,619 shares of ICG’s Common Stock during the three months ended September 30, 2013.

[2]

The exercise of SARs listed in this table resulted in the issuance of 99,851 shares of ICG’s Common Stock during the nine months ended September 30, 2013.

Other_Income_Loss_Net_Detail

Other Income (Loss), Net (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule Of Equity Method Investments [Line Items]	'	'	'	'
Realized gains on sales of marketable securities	'	$106	$23	$1,552
Gains on sales/distributions of ownership interests	'	1,704	'	1,924
Other	6	-55	-120	-94
Total other income (loss) for parent company	6	31,226	-97	32,853
Total other income (loss) for consolidated core businesses	-74	-4	-81	-4
Other income (loss), net	-68	31,222	-178	32,849
CIML	'	'	'	'
Schedule Of Equity Method Investments [Line Items]	'	'	'	'
Gain on fair value upon consolidation of Channel Intelligence	'	26,563	'	26,563
Go Industry	'	'	'	'
Schedule Of Equity Method Investments [Line Items]	'	'	'	'
Gain on sale of GoIndustry	'	$2,908	'	$2,908

Other_Income_Loss_Additional_I

Other Income (Loss) - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Schedule Of Equity Method Investments [Line Items]	'	'
Gains on sales/distributions of ownership interests	$1,700,000	$1,700,000
Number of Shares Distributed has Escrowed Proceeds Related to the Disposition of a Former Company	12,989	12,989
CIML	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Gain on fair value upon consolidation of Channel Intelligence	26,563,000	26,563,000
Metastorm	'	'
Schedule Of Equity Method Investments [Line Items]	'	'
Escrowed proceeds received	'	$200,000

Calculations_of_Net_Income_Los

Calculations of Net Income (Loss) Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amounts attributable to ICG Group, Inc.:	'	'	'	'
Income (loss) from continuing operations	($7,516)	$20,125	($26,809)	$2,205
Income (loss) from discontinued operations	4,184	1,216	35,687	6,122
Net income (loss) attributable to ICG Group, Inc.	($3,332)	$21,341	$8,878	$8,327
Basic income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Income (loss) from continuing operations	($0.21)	$0.57	($0.74)	$0.06
Income (loss) from discontinued operations	$0.12	$0.03	$0.98	$0.17
Net income (loss) attributable to ICG Group, Inc. per share	($0.09)	$0.60	$0.24	$0.23
Diluted income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Income (loss) from continuing operations	($0.21)	$0.56	($0.74)	$0.06
Income (loss) from discontinued operations	$0.12	$0.03	$0.98	$0.17
Net income (loss) attributable to ICG Group, Inc. per share	($0.09)	$0.59	$0.24	$0.23
Shares used in computation of basic income (loss) per share	36,303	35,650	36,494	35,907
Shares used in computation of diluted income (loss) per share	36,303	36,273	36,494	36,435
SARs	'	'	'	'
Diluted income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Shares used in computation of diluted income (loss) per share	'	511	'	425
Stock Options	'	'	'	'
Diluted income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Shares used in computation of diluted income (loss) per share	'	52	'	55
Restricted Stock	'	'	'	'
Diluted income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Shares used in computation of diluted income (loss) per share	'	39	'	25
DSUs	'	'	'	'
Diluted income (loss) per share attributable to ICG Group, Inc.:	'	'	'	'
Shares used in computation of diluted income (loss) per share	'	21	'	23

Potentially_Dilutive_Securitie

Potentially Dilutive Securities Not Included in Computation of Diluted Net Loss Per Share (Detail) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
SARs	'		'		'		'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'		'		'		'
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	3,956,542		797,475		3,956,542		797,475
Anti Dilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Price	$7.82		$10.59		$7.82		$10.59
Stock Options	'		'		'		'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'		'		'		'
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	1,750		'		1,750		'
Anti Dilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Price	$6.91		'		$6.91		'
Restricted Stock	'		'		'		'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'		'		'		'
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	1,228,778	[1]	811,553	[1]	1,228,778	[1]	811,553	[1]
DSUs	'		'		'		'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'		'		'		'
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	29,250		'		29,250		'
[1]	Anti-dilutive securities include contingently issuable shares unvested as of September 30, 2013 and 2012, the vesting of which is based on performance conditions and market conditions that have not yet been achieved. See Note 10, “Equity-Based Compensation.”