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Plans Fair Value of Plan Assets by Asset Class (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Pending sale requests | $ 370,497 | $ 378,194
Hedge Funds, Equity |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Pending sale requests | 500 | 14,300
Absolute Return Funds |  |
Schedule of Pension Plan Assets by Fair Value [Line Items] |  |
Pending sale requests | $ 8,000 | $ 8,000

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- Definition Schedule of Pension Plan Assets by Fair Value [Line Items] + References No definition available. + Details
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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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