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Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (287)
Other comprehensive income (loss) before reclassifications, net of tax	(48)	(89)	91	(54)
Other comprehensive income (loss) before reclassifications, foreign currency translation adjustments, net of tax	37		19
Other comprehensive (loss) income	(11)	(89)	110	(54)
Ending Balance	(177)		(177)
Unrealized Gains and (Losses) on Securities Available-for-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(287)	(14)
Other comprehensive income (loss) before reclassifications, net of tax			91	(54)
Amounts reclassified from accumulated other comprehensive income
Other comprehensive (loss) income			91	(54)
Ending Balance	(196)	(68)	(196)	(68)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance
Other comprehensive income (loss) before reclassifications, net of tax
Other comprehensive income (loss) before reclassifications, foreign currency translation adjustments, net of tax			19
Amounts reclassified from accumulated other comprehensive income
Other comprehensive (loss) income			19
Ending Balance	$ 19		$ 19

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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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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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