Unaudited Quarterly Consolidated Statement of Operation Data Restated (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended													6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information [Line Items]
Amortization of intangible asset	$ 1,073	$ 1,025		$ 932		$ 753		$ 1,552		$ 2,375	[1]	$ 703	$ 817	$ 1,685	$ 1,520	$ 2,710	$ 3,895	$ 3,783	$ 5,447	$ 4,226
Research and development expense	13,566	9,979	[2]	15,697		15,033	[2]	12,660	[3]	10,808	[3]	8,439	7,166					54,275	39,073	25,180
Income tax benefit	660	(1,075)	[4]	(2,019)	[4]	440		152		(813)	[5]	501	774					(1,994)	614	709
Impairment charge	$ 0	$ 3,613	[6]	$ 0		$ 0		$ 0		$ 0		$ 0	$ 0					$ 3,613	$ 0	$ 0

[1] Amortization of intangible assets of $2,375 in the third quarter of 2011 was driven by increased amortization expense associated with intangible assets acquired in the acquisitions of Griptonite and Blammo.

[2] Changes in the research and development expense from $15,033 in the first quarter of 2012 and $9,979 in the third quarter of 2012 was due primarily to changes in the fair market value of contingent consideration issued to employees who are former shareholders of Blammo.

[3] Research and development expense of $10,808 and $12,660 in the third and fourth quarters of 2011 were related to additional personnel and facility costs associated with the acquisitions of Griptonite and Blammo.

[4] The income tax benefit of $2,019 in the second quarter of 2012 was due primarily to the release of uncertain tax positions in certain foreign jurisdictions due to the expiration of the statute of limitations. The income tax benefit of $1,075 in the third quarter of 2012 was due primarily to the release of the GameSpy valuation allowance upon acquisition and changes in pre-tax income in certain foreign entities.

[5] The income tax benefit of $813 in the third quarter of 2011 was due primarily to the release of the valuation allowance associated with the acquisition of Griptonite.

[6] The goodwill impairment charge of $3,613 in the third quarter of 2012 was due to a decline in the estimated fair value of the APAC reporting unit attributable to an accelerated decline in the local feature phone business and the recent restructuring of the Company's operations in the region.