Other Noncurrent Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Payables and Accruals [Abstract]
Benefit plan liabilities	$ 179,720	$ 192,466	$ 204,025
Noncurrent tax liabilities	98,208	96,871	107,148
Other	171,034	156,831	163,100
Total other noncurrent liabilities	$ 448,962	$ 446,168	$ 474,273