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Income Taxes - Tax Effects of Temporary Differences (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Deferred income tax liabilities: |  |  |  |
Tax in excess of book depreciation | $ 42,345 | $ 35,411 | $ 6,673 |
Goodwill | 1,554 | 1,949 | 2,213 |
Intangible assets | 91,947 | 15,944 |  |
Other deferred tax liabilities | 897 | 1,924 | 63 |
Gross deferred income tax liabilities | 136,743 | 55,228 | 8,949 |
Deferred income tax assets: |  |  |  |
Goodwill | 1,666 | 2,411 | 3,215 |
Inventories | 4,490 | 2,035 | 836 |
Pension/Personnel accruals | 2,778 | 3,029 | 856 |
Net operating loss carry forwards | 8,313 | 1,196 | 1,351 |
Foreign tax credits | 3,242 | 290 | 3,026 |
Guarantee claim deduction | 1,141 | 1,141 | 1,141 |
Credit carry forwards | 2,582 | 1,853 |  |
Accruals and reserves |  |  | 114 |
Other deferred tax assets | 2,510 | 1,926 | 832 |
Gross deferred income tax assets | 26,722 | 13,881 | 11,371 |
Valuation allowance on deferred tax assets |  | (1,400) | (1,434) | $ (2,252)
Net deferred income tax assets | 26,722 | 13,881 | 9,937 |
Net deferred income tax assets |  |  | $ 988 |
Net deferred income tax liabilities | $ (110,021) | $ (41,347) |  |

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