Contingencies (Details)						1 Months Ended				3 Months Ended			12 Months Ended
	Jul. 15, 2016 USD ($)	Mar. 18, 2016 USD ($)	Feb. 22, 2016 USD ($)	Jul. 20, 2015 USD ($)	Dec. 02, 2014 USD ($)	May 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Sep. 30, 2011 USD ($) patent	Oct. 31, 2010 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)
Loss Contingencies [Line Items]
Litigation liability gain (loss)													$ 43,310,000	$ 41,826,000	$ (30,000,000)
Litigation accrual														88,261,000
OIG [Member]
Loss Contingencies [Line Items]
Litigation liability gain (loss)												$ (13,800,000)
Litigation charge														13,800,000
Loss contingency, settlement agreement, consideration														13,800,000
General Litigation Matter [Member]
Loss Contingencies [Line Items]
Litigation charge														3,300,000
Medtronic Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, settlement agreement, consideration paid						$ 7,500,000							45,000,000
Litigation liability gain (loss)										$ 43,300,000		$ 56,400,000	43,300,000	56,400,000
Reduction in litigation accrual													(88,300,000)
Litigation charge								$ 101,200,000
Company's patents in phases of litigation | patent								1
Company's cash and investment in escrow							$ 113,300,000
Release of funds from escrow														114,100,000
Medtronic Litigation [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Litigation accrual													88,300,000
Medtronic Litigation [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Litigation accrual													45,000,000
Trademark Infringement [Member]
Loss Contingencies [Line Items]
Litigation liability gain (loss)											$ 2,800,000			$ 2,800,000
Company's cash and investment in escrow					$ 32,500,000
Jury award									$ 60,000,000
Litigation liability													60,000,000			$ 30,000,000
Loss contingency, settlement agreement, consideration				$ 27,200,000
Litigation accrual													0
Restricted cash													$ 0
Madsen Medical, Inc. Litigation [Member]
Loss Contingencies [Line Items]
Jury award		$ 27,800,000
Loss contingency, settlement agreement, court													On March 18, 2016, the trial court entered judgment in favor of MMI in the amount of $27.8 million, which amount excluded the $14.0 million disgorgement awarded by the jury.
Loss contingency, estimate of possible loss													$ 0
Madsen Medical, Inc. Litigation [Member] | Loss Profits for Tortious Interference [Member]
Loss Contingencies [Line Items]
Jury award			$ 7,500,000
Madsen Medical, Inc. Litigation [Member] | Unjust Enrichment [Member]
Loss Contingencies [Line Items]
Jury award			14,000,000
Madsen Medical, Inc. Litigation [Member] | Punitive Damages [Member]
Loss Contingencies [Line Items]
Jury award			20,000,000
Madsen Medical, Inc. Litigation [Member] | Damages for Breach of Contract [Member]
Loss Contingencies [Line Items]
Jury award			$ 300,000
Madsen Medical, Inc. Litigation [Member] | Attorney Fees And Costs [Member]
Loss Contingencies [Line Items]
Jury award	$ 1,100,000