GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended													12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009		Dec. 31, 2009 CDN	Dec. 31, 2011 CDN Customer relationships Month	Jun. 01, 2009 CDN Customer relationships Month	Dec. 31, 2011 CDN Trade names Month	Jun. 01, 2009 CDN Trade names Month	Dec. 31, 2011 CDN Noncompete Agreements Month	Jun. 01, 2009 CDN Noncompete Agreements Month	Dec. 31, 2009 IP Services	Dec. 31, 2009 IP Services FCP
Goodwill [Line Items]
Aggregate goodwill impairment charge													$ 51,513,000		$ 48,000,000							$ 37,848,000	$ 3,500,000
Amortization of acquired technologies	875,000	875,000	875,000	875,000	874,000	979,000	979,000	979,000	3,500,000	[1]	3,811,000	[1]	8,349,000	[1]	4,100,000
Estimated remaining useful life of intangible assets (in months)																11	38	17	32	1	9
Increase to net loss due to change in estimates of remaining useful lives for the intangible assets													(2,800,000)
Increase to net loss due to change in estimates of remaining useful lives for the intangible assets, per basic and diluted share													$ (0.06)
Amortization expense for intangible assets									$ 3,500,000		$ 6,100,000		$ 9,000,000

[1] Amortization of acquired technologies during the year ended December 31, 2009 included impairment charges of $4.1 million for acquired CDN advertising technology.