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Income Taxes - The Tax Effects of the Temporary Differences (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | --- | ---
Deferred income tax liabilities: |  |  |  |
Tax in excess of book depreciation | $ 6,673 | $ 6,670 | $ 5,099 |
Goodwill | 2,213 | 1,987 | 1,821 |
Allowance for bad debts |  |  | 18 |
Other deferred tax liabilities | 63 | 112 | 843 |
Gross deferred income tax liabilities | 8,949 | 8,769 | 7,781 |
Deferred income tax assets: |  |  |  |
Goodwill | 3,215 | 4,141 | 4,846 |
Inventories | 836 | 768 | 167 |
Pension/Personnel accruals | 856 | 921 | 503 |
Deductions for uncollectible Eltmann receivables |  |  | 310 |
Net operating loss carry forwards | 1,351 | 3,682 | 7,526 |
Foreign tax credits | 3,026 | 3,844 | 3,326 |
Guarantee claim deduction | 1,141 | 1,141 |  |
Accruals and reserves | 114 | 293 |  |
Other deferred tax assets | 832 | 550 | 421 |
Gross deferred income tax assets | 11,371 | 15,340 | 17,099 |
Valuation allowance on deferred tax assets | (1,434) | (2,252) | (12,066) | (16,604)
Net deferred income tax assets | 9,937 | 13,088 | 5,033 |
Net deferred income tax assets (liabilities) | $ 988 | $ 4,319 | $ (2,748) |

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