Allocation of Purchase Price for Acquisitions and Enterprise Value of Channel Intelligence (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
SeaPass
Net assets acquired:
Goodwill	$ 57,996
Customer lists (8-11 year life)	15,902
Technology (5-10 year life)	3,348
Trademarks, trade names and domain names (11-15 year life)	6,696
Non-compete agreements (3-5 year life)	2,511
Other net assets (liabilities)	(5,850)
Purchase price allocation assets acquired liabilities net	80,603
Noncontrolling interest	(31,824)	[1]
Purchase price allocation assets acquired	48,779
MSDSonline
Net assets acquired:
Goodwill	15,847
Customer lists (8-11 year life)	20,440
Technology (5-10 year life)	1,900
Trademarks, trade names and domain names (11-15 year life)	6,800
Non-compete agreements (3-5 year life)	3,580
Other net assets (liabilities)	1,170
Purchase price allocation assets acquired liabilities net	49,737
Noncontrolling interest	(1,355)	[1]
Purchase price allocation assets acquired	48,382
Media Iq
Net assets acquired:
Goodwill	9,491
Customer lists (8-11 year life)	6,200
Technology (5-10 year life)	900
Trademarks, trade names and domain names (11-15 year life)	600
Non-compete agreements (3-5 year life)	268
Other net assets (liabilities)	316
Purchase price allocation assets acquired liabilities net	17,775
Purchase price allocation assets acquired	17,775
Uai
Net assets acquired:
Goodwill	2,922
Customer lists (8-11 year life)	3,100
Technology (5-10 year life)	1,050
Non-compete agreements (3-5 year life)	160
Other net assets (liabilities)	(505)
Purchase price allocation assets acquired liabilities net	6,727
Purchase price allocation assets acquired	$ 6,727

[1] ICG estimated the fair value of the noncontrolling interest of MSDSonline with consideration of discounts for lack of control and lack or marketability. See Note 16, "Redeemable Noncontrolling Interest" with respect to MSDSonline. The amount of noncontrolling interest for SeaPass is reflected in the line item "Impact of consolidated subsidiaries transactions" on ICG's Consolidated Statements of Changes in Equity during the year ended December 31, 2012.