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Beginning Balance, Annual Activity and Ending Balance of each Component of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,479)	$ (1,177)	$ (1,762)		$ (1,762)
Interest Rate Swap, Current period, other comprehensive income	133	174	178	41	485	87
Foreign currency translation, Current period, other comprehensive income	(126)	(476)	407	306	(195)	428
Accumulated other comprehensive income, Current period, other comprehensive income	7	(302)	585
Ending Balance	(1,472)	(1,479)	(1,177)		(1,472)
Interest Rate Swap
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(376)	(550)	(728)		(728)
Interest Rate Swap, Current period, other comprehensive income	133	174	178
Ending Balance	(243)	(376)	(550)		(243)
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,103)	(627)	(1,034)		(1,034)
Foreign currency translation, Current period, other comprehensive income	(126)	(476)	407
Ending Balance	$ (1,229)	$ (1,103)	$ (627)		$ (1,229)

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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 of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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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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