Component of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	$ 2,500
Other comprehensive income (loss) before reclassifications	202
Amounts reclassified from accumulated other comprehensive income (loss)	(2,782)
Net current-period other comprehensive loss	(2,580)
Balance as of June 30, 2013	(80)
Currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	2,488
Other comprehensive income (loss) before reclassifications	294
Amounts reclassified from accumulated other comprehensive income (loss)	(2,782)
Net current-period other comprehensive loss	(2,488)
Unrealized gains (losses) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	12
Other comprehensive income (loss) before reclassifications	(92)
Net current-period other comprehensive loss	(92)
Balance as of June 30, 2013	$ (80)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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