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Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Other Liabilities [Line Items]      
Benefit plan liabilities $ 209,880 $ 229,963 $ 191,817
Noncurrent tax liabilities 167,158 171,181 168,322
Other 166,617 182,882 168,843
Total other noncurrent liabilities $ 543,655 $ 584,026 $ 528,982