Total Net Sales by Product Group Category (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 830,000	$ 758,000	$ 2,456,400	$ 2,258,200
Vascular
Segment Reporting Information [Line Items]
Net sales	231,500	209,900	683,700	625,300
Urology
Segment Reporting Information [Line Items]
Net sales	209,600	193,700	618,100	574,200
Oncology
Segment Reporting Information [Line Items]
Net sales	229,700	215,500	673,400	636,700
Surgical Specialties
Segment Reporting Information [Line Items]
Net sales	135,600	118,100	410,100	358,400
Other Product Group
Segment Reporting Information [Line Items]
Net sales	$ 23,600	$ 20,800	$ 71,100	$ 63,600