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Schedule of Fair Value of Pensions Plan Assets by Asset Category (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Defined Benefit Plan Disclosure |  |  |
Total | $ 326,600 |  |
Group Annuity Insurance Contracts | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 29,392 | $ 2,990 | $ 2,985
United States Pension Plans, Defined Benefit |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 298,404 | 316,072 | 256,373
United States Pension Plans, Defined Benefit | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,773 | 1,098 |
United States Pension Plans, Defined Benefit | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 293,649 | 311,984 |
United States Pension Plans, Defined Benefit | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 2,982 | 2,990 |
United States Pension Plans, Defined Benefit | Corporate Debt Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 240,695 | 193,741 |
United States Pension Plans, Defined Benefit | Corporate Debt Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 240,695 | 193,741 |
United States Pension Plans, Defined Benefit | US Government Debt Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 23,761 | 65,830 |
United States Pension Plans, Defined Benefit | US Government Debt Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 23,761 | 65,830 |
United States Pension Plans, Defined Benefit | Global equity Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 29,193 |  |
United States Pension Plans, Defined Benefit | Global equity Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 29,193 |  |
United States Pension Plans, Defined Benefit | Group Annuity Insurance Contracts |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 2,982 | 2,990 |
United States Pension Plans, Defined Benefit | Group Annuity Insurance Contracts | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 2,982 | 2,990 |
United States Pension Plans, Defined Benefit | Other |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 65 |
United States Pension Plans, Defined Benefit | Other | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 65 |
United States Pension Plans, Defined Benefit | Cash and Cash Equivalents |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,773 | 1,098 |
United States Pension Plans, Defined Benefit | Cash and Cash Equivalents | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,773 | 1,098 |
United States Pension Plans, Defined Benefit | Asset-backed Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 3,747 |
United States Pension Plans, Defined Benefit | Asset-backed Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 3,747 |
United States Pension Plans, Defined Benefit | U.S. Equity (Large Cap) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 33,970 |
United States Pension Plans, Defined Benefit | U.S. Equity (Large Cap) | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 33,970 |
United States Pension Plans, Defined Benefit | International Equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 14,631 |
United States Pension Plans, Defined Benefit | International Equity | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 14,631 |
Foreign Pension Plans, Defined Benefit |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 28,141 | 29,511 | $ 25,756
Foreign Pension Plans, Defined Benefit | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 702 | 133 |
Foreign Pension Plans, Defined Benefit | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,029 | 29,378 |
Foreign Pension Plans, Defined Benefit | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 26,410 |  |
Foreign Pension Plans, Defined Benefit | Group Annuity Insurance Contracts |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 26,410 |  |
Foreign Pension Plans, Defined Benefit | Group Annuity Insurance Contracts | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 26,410 |  |
Foreign Pension Plans, Defined Benefit | Other |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,029 | 957 |
Foreign Pension Plans, Defined Benefit | Other | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 1,029 | 957 |
Foreign Pension Plans, Defined Benefit | Cash and Cash Equivalents |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | 702 | 133 |
Foreign Pension Plans, Defined Benefit | Cash and Cash Equivalents | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total | $ 702 | 133 |
Foreign Pension Plans, Defined Benefit | U.K. Government Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 22,811 |
Foreign Pension Plans, Defined Benefit | U.K. Government Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 22,811 |
Foreign Pension Plans, Defined Benefit | International Equity |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | 5,610 |
Foreign Pension Plans, Defined Benefit | International Equity | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure |  |  |
Total |  | $ 5,610 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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