Operating Segments and Geographic Information - Reconciliations of Other Segment Measures to Consolidated Totals (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	$ 3,262,827	$ 2,751,753	$ 2,584,583
Cash and cash equivalents	741,162	613,304	395,095	382,552
Goodwill	943,374	773,048	778,708
Intangible assets, less accumulated amortization	461,292	376,976	428,273
Deferred income taxes	62,809	54,801	66,855
Income tax receivable	4,953	12,169	8,432
Total acquisition of property, plant and equipment	45,459	40,209	41,010
Total depreciation and amortization	(102,162)	(94,451)	(59,355)
Discontinued operations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total acquisition of property, plant and equipment			795
Total depreciation and amortization			(1,468)
Reportable Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	960,782	833,585	825,123
Total acquisition of property, plant and equipment	42,442	38,791	39,879
Total depreciation and amortization	(102,162)	(94,451)	(57,887)
Corporate assets [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	88,455	87,870	82,097
Total acquisition of property, plant and equipment	$ 3,017	$ 1,418	$ 336