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Income Taxes - Deferred Income Tax Balances (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
U.S. foreign tax credit | $ 7,027 | $ 3,309
Stock and long-term compensation plans | 2,304 | 2,817
Foreign NOL & other carryforwards | 16,340 | 13,771
US state NOL carryforwards | 803 | 248
US alternative minimum tax | 357 | 395
Deferred revenue | 358 | 672
Pension liability, net | 624 | 0
Reserve for uncertain tax issues | (445) | (560)
Amortization and depreciation | 708 | 627
Accrued expenses and other | 523 | 288
Total gross deferred tax assets | 28,599 | 21,567
Less: Valuation allowance | (6,274) | (13,719)
Net deferred income tax assets | 22,325 | 7,848
Swiss tax allowances | 691 | 851
US tax on unremitted foreign earnings | 424 | 137
Deferred revenue |  | 901
Intangible assets | 10,947 | 8,008
Deferred tax liabilities | 12,062 | 9,897
Net deferred tax assets | $ 10,263 |
Net deferred tax liabilities |  | $ (2,049)

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