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Income Taxes - Additional Information (Detail) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Income Taxes [Line Items] |  |  |
Effective income tax rate | 29.30% | 32.60% |
Federal statutory rate | 35.00% |  |
Gross deferred tax assets | $ 73,400,000 |  | $ 77,200,000
Valuation allowance related to the foreign tax credit carryforwards | 14,700,000 |  | 14,600,000
Accrued gross liabilities | 636,000 |  | 636,000
Accrued interest and penalties for discontinued operations | 441,000 |  | 418,000
Period of unrecognized tax benefits not expected to be recognized | 12 months |  |
Liabilities associated with uncertain tax positions | $ 1,100,000 |  | $ 1,100,000
Foreign Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Period of tax credit | 10 years |  |
Expiration period | 2019 |  |

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