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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
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 |

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