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Postretirement Benefit Plans - Defined Benefit Pension Plans - Additional Information (Detail) - Defined Benefit Pension Plan [Member] | 9 Months Ended
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Sep. 30, 2015 USD ($)
U.S Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Company's expected contribution to qualified plan, current fiscal year | $ 0
Expected payment related to non-qualified plan | 210,000
Payments related to non-qualified plans | 187,000
U.K Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Company's expected contribution to qualified plan, current fiscal year | 604,000
Employer contributions | $ 511,000

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- Definition Current year payments made out of an entity's cash to participants of an unfunded nonqualified pension plan. + References No definition available. + Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
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