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Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Payables and Accruals [Abstract]      
Benefit plan liabilities $ 206,200 $ 192,466 $ 208,982
Noncurrent tax liabilities 96,083 96,871 100,528
Other 150,001 156,831 152,405
Total other noncurrent liabilities $ 452,284 $ 446,168 $ 461,915