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Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Payables and Accruals [Abstract]      
Noncurrent tax liabilities $ 218,308 $ 96,871 $ 96,447
Benefit plan liabilities 196,967 192,466 179,979
Other 161,052 156,831 178,008
Total other noncurrent liabilities $ 576,327 $ 446,168 $ 454,434