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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Income Tax [Line Items]
Undistributed non-U.S. subsidiary earnings	$ 1,800,000
Valuation allowance	1,939,000	886,000
Liability for uncertain tax positions	3,800,000	2,900,000
Reduction in unrecognized tax benefit	$ 1,800,000
Minimum
Income Tax [Line Items]
Operating loss carryforward period	20
Maximum
Income Tax [Line Items]
Operating loss carryforward period	Indefinite

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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