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Schedule of Other Liabilities and Deferred Credits (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Deferred Credits and Other Liabilities [Abstract] |  |  |
Postretirement benefits liability |  |  | $ 2,642
Pension liabilities |  | $ 33,124 | 36,614
Liability for uncertain tax positions |  | 43,790 | 23,043
Deferred tax liability |  | 1,913 |
Other | [1] | 11,075 | 9,692
Other liabilities and deferred credits |  | $ 89,902 | $ 71,991
[1] | Includes $3.8 million as of December 31, 2018 related to a $5.5 million charge incurred during the twelve months ended December 31, 2018 relating to the abandonment of office leases for duplicate facilities in St. Rose and New Orleans, Louisiana, Houston Texas and Aberdeen, Scotland.

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- Definition Noncurrent portion of the defined benefit and defined contribution pension plans, postemployment plans, and Multiemployer Plans, excluding the Postretirement benefits liability. + References No definition available. + Details
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