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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Line Items]
Provision for income taxes expense (benefit)	$ 1,210,000	$ 4,165,000	$ 2,152,000	$ 10,987,000
Effective income tax rates			25.10%	36.60%
Australia And Hong Kong
Income Taxes [Line Items]
Change in provision for income taxes			500,000	36,600,000
Decrease in Income Tax Rate			6.10%
New Jersey
Income Taxes [Line Items]
Change in provision for income taxes			$ 100,000
Increase in Income Tax Rate			1.10%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit that is attributable to changes in the income tax laws or rates.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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