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Description of Business and Summary of Significant Accounting Policies - Other Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Other Liabilities [Abstract] |  |
Pension and postretirement benefits liability | $ 34,763 | $ 37,988
Straight-line lease liability | 95,078 | 89,959
Deferred compensation liability | 25,055 | 22,204
Other | 949 | 885
Total other liabilities | $ 155,845 | $ 151,036

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- Definition The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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