Goodwill and Intangible Assets (Detail) - Carrying Amounts of Amortizable Intangible Assets (Parentheticals) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Additions due to acquisition (in Dollars)	$ 8,535	[1]
Minimum [Member] | Trade Names [Member]
Intangiblе assеts, usеful lifе (yеars)	2 years
Maximum [Member] | Trade Names [Member]
Intangiblе assеts, usеful lifе (yеars)	5 years
Ideas International Limited [Member]
Additions due to acquisition (in Dollars)	8,500
Trade Names [Member]
Additions due to acquisition (in Dollars)	240	[1]
Customer Relationships [Member]
Additions due to acquisition (in Dollars)	3,170	[1]
Intangiblе assеts, usеful lifе (yеars)	4 years
Media Content [Member]
Additions due to acquisition (in Dollars)	3,170	[1]
Intangiblе assеts, usеful lifе (yеars)	4 years
Computer Software, Intangible Asset [Member]
Additions due to acquisition (in Dollars)	$ 1,955	[1]
Intangiblе assеts, usеful lifе (yеars)	3 years

[1] The Company acquired Ideas International in the second quarter of 2012 and recorded a total of $8.5 million of amortizable intangible assets. See Note 2-Acquisition above for additional information.