Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Jun. 30, 2004 San Francisco County, California	Dec. 31, 2006 Eastern District of Pennsylvania	Jan. 31, 2014 Subsequent Event [Member] Eastern District of Pennsylvania
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Trial or Alternative Dispute Resolution				On June 18, 2004, Marvin Weinstat, DDS and Richard Nathan, DDS filed a class action suit in San Francisco County, California alleging that the Company misrepresented that its Cavitron® ultrasonic scalers are suitable for use in oral surgical procedures.	On December 12, 2006, a Complaint was filed by Carole Hildebrand, DDS and Robert Jaffin, DDS in the Eastern District of Pennsylvania (the Plaintiffs subsequently added Dr. Mitchell Goldman as a named class representative).  The case was filed by the same law firm that filed the Weinstat case in California.  The Complaint asserts putative class action claims on behalf of dentists located in New Jersey and Pennsylvania.	On January 20, 2014, the Company was served with a qui tam complaint filed by two former and one current employee of the Company under the Federal False Claims Act and equivalent state and city laws. The lawsuit was previously under seal in the U.S. District Court for the Eastern District of Pennsylvania
Operating leases, rent expense, total	$ 39.7	$ 42.3	$ 39.0
Law suit filling date				June 18, 2004	December 12, 2006	2014-01-20
Name of plaintiff (s)				Marvin Weinstat, DDS and Richard Nathan, DDS	Carole Hildebrand, DDS and Robert Jaffin, DDS and Dr. Mitchell Goldman	Former and Current Employees
Liability for employees under contract, if terminated by the Company without cause	$ 15.8