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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating Loss Carryforwards [Line Items] |  |  |
Intercompany dividend | $ 10,000 | $ 30,650 | $ 30,752
Statutory tax rate | 34.00% | 35.00% | 35.00%
Long-term deferred tax assets | $ 6,216 | $ 6,885 |
Current deferred tax liabilities | 1,752 | 1,235 |
Unremitted foreign earnings available for distribution | 22,672 | 19,849 |
Deferred tax liability | 137 | 955 |
Amount of Unremitted foreign earnings permanently invested | 131,327 | 83,122 |
Amount subject to tax upon repatriation | 1,968 | (9) | $ 212
Amount of restricted stock and stock options tax benefits credited to additional paid-in capital | 318 | 253 | 3,318
Foreign tax credit carryforwards expire amount | $ 3,309 |  |
U.S. foreign tax credit carryforwards expiration | 2023 |  |
Net increase (decrease) change in the valuation allowance | $ 11,219 | 101 | $ 115
Tax benefit reserve | 13,719 | 2,500 |
United States [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Cash in banks | 30,018 |  |
Outside United States [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Cash in banks | 48,504 |  |
Amount subject to tax upon repatriation | 45,520 |  |
Retained earnings to be available for distribution | 29,335 |  |
Outside United States [Member] | Permanently Invested [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Retained earnings to be available for distribution | 19,169 |  |
Intellectual Property [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax benefit reserve | $ 560 | $ 560 |

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