Supplemental Financial Statement Information - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 1,222,720
Other comprehensive income (loss)	44,830	$ (34,064)
Amounts reclassified from AOCL	(731)	(1,587)
Ending balance	1,288,454	1,339,354
Net AOCL, end of period	(126,848)	(117,612)	$ (171,678)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(160,620)	(80,483)
Other comprehensive income (loss)	46,284	(29,366)
Amounts reclassified from AOCL		(122)
Ending balance	(114,336)	(109,971)
Pension and Other Postretirement Benefit Activity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(17,567)	(14,957)
Amounts reclassified from AOCL	(731)	(1,587)
Ending balance	(18,298)	(16,544)
Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	6,509	11,892
Other comprehensive income (loss)	(494)	(1,528)
Amounts reclassified from AOCI	(229)	(1,461)
Ending balance	$ 5,786	$ 8,903